Creating form PowerApp form and submit data in SP list

Hello,

For the mentioned requirement you can opt Canvas App as the form is quite simple and straight forward.

1. Create a Screen

2. Add Connection of the sharepoint list to the app.

3. In the Screen, drag and drop the drop downlist and Click on properties Select Items.

4. In the Items Property, Add Others Option and add collection which should pick data from the sharepoint list.So, Others as well ID will come as drop down items into the list

5. Add Textbox and Select Format as number .

6. Now, go to the onselect Property of Drop downlist ,add condition : If dropdown selected item value is Select then make textbox visible as true.

7. Add Submit button and onselect property of button, use patch statement to add item into the sharepoint list.

Thanks,