This is a Gmail add-on that you can use to duplicate email drafts in Gmail. All releases can be found at the base repository here.
You can install the Gmail add-on here.
As of June 25th, 2024 I, Jonathan Li, am in progress reverifying the app. For now it is limited to 100 users.
To clone the code and publish just for yourself see the video: https://youtu.be/uPasSfUkfKQ