Hopefully you are already subscribed to the official Google Workspace Developer Newsletter. If not, or in case you missed the last edition the headline story highlights some new documentation to help developers understand and compare different options for extending the Google Workspace UI:
A major challenge for developers is understanding their options for extending the UI of Google Workspace: Google Workspace Add-ons, Editor Add-ons, Chat apps, Drive apps, and more! Each option has unique strengths, challenges, and limitations. Until now, there hasn’t been a central place for developers to learn what’s possible for extending the Google Workspace UI and to compare the limitations that exist in terms of coding options, UI frameworks, and which options can be published to the Google Workspace Marketplace.
The page includes a nice table included in this post as the feature image.