FYI, the lineage OS for microg project now included the pro1x to their supported devices. Unfortunately I have not yet been able to test it, but maybe this is something for the ROM's thread @EskeRahn?
For anyone not knowing this project, it offers a lineage OS built with included microg as spoofed system app, so you don't have to root your device in order to be able to get the microg support and microg is the only app which is spoofable, what increases security. At least, as far as I understood the description. As I said I unfortunately was not able to test it yet, since I seem to be one