Sorry if the information is mentioned somewhere already, this thread is pretty long and I didn’t read all posts. I spend few hours to make microG working on my Xperia 10 II, Sailfish OS version 4.6.0.15.
Recent version 0.3.6 was not working for me, I was unable to get spoofed signatures. But the GmsCore 0.2.29 with FakeStore 0.2.1 works fine…
edit: MicroG 0.3.6 works fine on SFOS 5.0.0.55, Xperia 10.II