Anyone know if this works fine alongside work profiles (seems like it doesnt conflict) and if apps like insular/shelter are going to be able to configure the private space?
Edit: partially answered my question. Set up a private space just fine (though I can't access it since I'm not using the OS launcher) and it doesnt conflict with the work profile.
You also don't need to create another google account for it.
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.