How to append html inside GET_ITO_PROJECTS_DASHBOARD_SP so all script

Of you want the function will return the provided html, then please check this once.

function GET_ITO_PROJECTS_DASHBOARD_SP() {
    var P_OWENER_ORG_ID = $("#hiddenCompCivilNo").val();

    var data = {
        P_OWENER_ORG_ID: P_OWENER_ORG_ID
    };

    // AJAX call to retrieve data
    return $.ajax({
        type: "POST",
        contentType: "application/json; charset=utf-8",
        url: "../BusinessLayer/WebMethods.asmx/GET_ITO_PROJECTS_DASHBOARD_SP",
        data: JSON.stringify(data),
        dataType: "json"
    }).then(function(Result) {
        if (Result.d.Status == "1") {
            // Begin constructing the HTML dynamically
            var htmlToReturn = `
                

                    

                        

                            

                                

                            
                            

                                

                                    

                                    

                                        

                                            

                                                
?????
                                                

                                                    
            `;

            // Check and populate P_PROJ_SUBMISSION_CUR table
            if (Result.d.P_PROJ_SUBMISSION_CUR != null && Result.d.P_PROJ_SUBMISSION_CUR.length > 0) {
                htmlToReturn += ``;
                $.each(Result.d.P_PROJ_SUBMISSION_CUR, function(index, item) {
                    htmlToReturn += `
                        `;
                });
            }

            htmlToReturn += `
                                                    

                                                        

                                                        
?
??? ???????
??????? 

                            
${index + 1}
                            
${item.PROJECT_NAME}
                            
${item.stageDate}
                        
                                                
                                            
                                        
                                    
                                    

                                        

                                            

                                                
??????
                                                

                                                    
            `;

            // Check and populate P_PROJ_CLOSING_CUR table
            if (Result.d.P_PROJ_CLOSING_CUR != null && Result.d.P_PROJ_CLOSING_CUR.length > 0) {
                htmlToReturn += ``;
                $.each(Result.d.P_PROJ_CLOSING_CUR, function(index, item) {
                    htmlToReturn += `
                        `;
                });
            }

            htmlToReturn += `
                                                    

                                                        

                                                        
?
??? ???????
??????? 

                            
${index + 1}
                            
${item.PROJECT_NAME}
                            
${item.stageDate}
                        
                                                
                                            
                                        
                                    
                                    

                                
                            
                        
                    
                
`;

            return htmlToReturn;
        }
    });
}

this answer not as expected 
i expect to add html file inside jquery 

so as examle 

function GET_ITO_PROJECTS_DASHBOARD_SP() {

var rowhtml="

}

Check this

function GET_ITO_PROJECTS_DASHBOARD_SP() {
    var P_OWENER_ORG_ID = $("#hiddenCompCivilNo").val();

    var data = {
        P_OWENER_ORG_ID: P_OWENER_ORG_ID
    };

    $.ajax({
        type: "POST",
        contentType: "application/json; charset=utf-8",
        url: "../BusinessLayer/WebMethods.asmx/GET_ITO_PROJECTS_DASHBOARD_SP",
        data: JSON.stringify(data),
        dataType: "json",
        success: function (Result) {
            if (Result.d.Status == "1") {
                // Clear and setup tables
                $("#gvResultSub").empty().html('');
                $("#gvResultClose").empty().html('');

                // Populate P_PROJ_SUBMISSION_CUR table
                if (Result.d.P_PROJ_SUBMISSION_CUR != null && Result.d.P_PROJ_SUBMISSION_CUR.length > 0) {
                    $('.gvResultSub-container').show();

                    $.each(Result.d.P_PROJ_SUBMISSION_CUR, function (index, item) {
                        if (index === 0 && MYLang.ReturnLang() == "ar-KW") {
                            $("#gvResultSub > thead").append("???? ?????????????? ");
                        }

                        var row = `
                            ${index + 1}
                            ${item.PROJECT_NAME}
                            ${item.stageDate}
                        `;
                        $("#gvResultSub > tbody").append(row);
                    });
                }

                // Populate P_PROJ_CLOSING_CUR table
                if (Result.d.P_PROJ_CLOSING_CUR != null && Result.d.P_PROJ_CLOSING_CUR.length > 0) {
                    $('.gvResultClose-container').show();

                    $.each(Result.d.P_PROJ_CLOSING_CUR, function (index, item) {
                        if (index === 0 && MYLang.ReturnLang() == "ar-KW") {
                            $("#gvResultClose > thead").append("???? ?????????????? ");
                        }

                        var row = `
                            ${index + 1}
                            ${item.PROJECT_NAME}
                            ${item.stageDate}
                        `;
                        $("#gvResultClose > tbody").append(row);
                    });
                }
            }
        }
    });
}