Gotify, super easy to setup, very basic but has everything I need.

Root in a rootless container, right? Right Anakin?

I’ve been using watcharr for this purpose. It’s fairly simple but fits my needs perfectly (I also really like the ability to change the rating system to be 0-100). It also has a rudimentary import from jellyfin (needs a few clicks, no builtin scheduled imports unfortunately).

Fair warning the last update was 5 months ago but I’m not personally missing anything apart from jellyfin scheduled imports.