Ohhh, thank you very much! That was my las app to enter #Obtainium !
It's much easier:
1. Add the general url to the Guardian Fdroid Repo: https://guardianproject.info/fdroid/repo
2. Below where it says "Html source", click and change to " Third Party Fdroid Repository "
3. Write "tor browser" in the app name section
Discussion
I also lost some time figuring it out 🤣. Glad it worked!