I have this problem KissAnime shutdown and lost half of the list. Personally decided back then to do it manually on Excel.
Took a bit of time but very much worth it (imo). No stress of losing it due to shutdowns. It’s also easy to track how many shows you watched, dropped or want to watch because of the formulas you can use within Excel.
Trakt: https://trakt.tv/
Usable per Web or via App
Alternative to self host: https://github.com/FuzzyGrim/Yamtrack
Havent tried it out yet
oh damn, ty
My pleasure :)