Hey, really glad to see you coming here!

I found another spare for repo. if the current alt goes down https://github.com/ThePBone/tachiyomi-extensions-revived

I use batoto extension (revived) from this repo, it works on TachiyomiJ2K. Not sure with the latest Tachiyomi

Used this for Batoto and Mangadex. Works for TachiyomiSY