“But think of the children!!!”

yeah true some OEMs take ages to release their source code, or sometimes don’t do it at all even though they’re obligated by their GPL license

if there are no custom roms for your device you should just give up. it requires so much resources that it’s almost tiring. If you really want to build lineage for your phone though, there’s a guide on lineage wiki to port the rom. It’s really easy, you just have to download the source code of the rom, add the source code of your phone with its proprietary blobs, then build. The hard part is wether you have the hardware to build or no. You need: 64gb of ram, ccache and zram enabled, 300gbs of storage, and an 8 cores cpu

just don’t play the rereleases and get an emulator then