Like I said... @jomadeto had a working A12 build, we were just waiting for the Lineage maintainer (@mikeioannina) if I recall well, to write the proximity sensor things, however he has stopped maintaining it, so... nobody is writing that part and the only way to add proximity sensor without writting that is too tricky for an official build (@Huexxx has several unofficial build even with A13 I believe)
I'd really love to go for A12 or 13, but I don't have the knowledge to do it without help, so I'll keep maintaining our A11 meanwhile, that's It.
Regards.