i degoogled my phone, as far as I could possibly go, with ABD. Now signal is complaining it cant find playstore. I uninstalled signal. Simplex is fine.

There is one big problem with open source and central servers, you can never tell if there are asynchronous offline , non open source processes that are harvesting server data and analysing it. If you cant run your own server, then maybe find an app where you can.