One method could be importing the Github action from https://github.com/BigWigsMods/packager

I took a quick look at WoWUp. I added tags to this repository. From what I saw, that should get WoWUp to recognize and pull it. Give it a day and let me know.

Doesn't seem to work unfortunately.

Are you doing the basic search or are you using the Install from URL option?

I tried it again and it works now