Yes we have started using theme app extensions in the existing Shopify embedded partner app using (App Bridge, without relying on the Shopify CLI extensions).
But the problem is we are still getting this kind of error during write themes
**Error:-
ERROR 
: Error: Theme file modification requires an exemption from Shopify. The REST API endpoint is not available without exemption. Please request access through: Issue with "write_themes" and "write_themes_assets" scopes in GraphQL API or contact Shopify Partner Support to request write_themes scope exemption.
**
even though using theme app extensions do we need to exemption from you?