For an open source solution, DivestOS's Carrion is probably the best bet. There are a few others kicking around f-droid as well.
https://gitlab.com/divested-mobile/carrion
I haven't used it, but I've heard good things about it and I enjoy many of their other apps. I too just use the google pixel blocker because its way too good.
I moved one of my computers to endeavor, but one is still on manjaro and the contrast is kinda hilarious. Manjaro machine always gets funky after updates, it struggles to deal with sleep and hibernation, and it feels slow even when its like 4x as powerful as my EndeavourOS machine.