Above all ROMs are developed by Bombsquad
and these files are hosted in AFH
Source Bombsquad & AFH
[ROM][RMX1921][9.0.0][UNOFFICIAL] LineageOS 16.0
Above ROM is developed by thesprintster
Source thesprintster & XDA
Download the latest build
Reboot to recovery
Make sure you're using stock unmodified vendor.
Wipe data, cache, system ( Don't wipe vendor )
Flash the latest build and GApps
These are unofficial & beta ROMs and contain bugs So please be careful to backup your data before flashing these ROMs.
Please do help the developers by sending the logcats and informing about the bugs you face.
These are ROMs are not mine and are developed by respective developers as mentioned above.