Setup custom time zone for azure elastic pool database

Question

Looking solutions on how to set up a custom time zone for azure elastic pool database, the default time zone for azure elastic pool databases UTC, how do I Modify the default time zone

1. How to set up an IST time zone for an elastic pool?
2. All databases in the elastic pool will take the elastic pool time zone or do we required to set the time zone for each database separately?
   If Yes, How do I modify the default time zone for databases elastic pool databases?
3. How to control the size of the database in Azure elastic pool databases for each database separately?