A handy phone call manager with phonebook, number blocking and multi-SIM support - FossifyOrg/Phone
Idk why I never heard of this one before but it got an update recently so it appeared in my Droid-ify feed and now I'm sharing it. Hopefully someone finds it useful.
On a side note, if anyone uses Omnivore, I discovered yesterday that they have sold out as well (to an AI startup). We got a 2 weeks notice to export our stuff because accounts will be deleted.