Officially, the version I created the pack with is Unity 2022.3.0f1, and typically LTS minor version releases don't massively break compatability. So although I didn't specifically test 2022.3.4, there's no reason it shouldn't work in that version. Support for the Unity 6 beta is also a bit wonky but I am actively developing that.
Yes! I'm always on the lookout for suggestions and I did plan on expanding the selection of effects in this pack - that's definitely on the list.