You probably already know this, but just in case: you should first check the xda-developers forum if there isn't already an unofficial port available.
Re:LineageOS 19
by raelmebrand on Tuesday April 26, 2022 @09:58AM
(#31167536)
Please try https://github.com/phhusson/treble_experimentations/wiki for recent devices (Android oreo and later). GSI is fine; of course not everything is perfect. Also google XDA GSI forums for specific advice
On most Android devices, you can flash a new recovery image on with fastboot. You can not do this with Samsung devices, Samsung has its own proprietary methodology of flashing recovery images called Odin. Samsung is a supported LineageOS vendor, but Samsung devices have an extra step to even flash the device with a pre-built ROM.
Does anyone here have experience in porting AOSP/LineageOS to an unsupported device? Any suggested materials and resources?
I have the spare time to give it a go on getting it for my Samsung model, but no idea where to start.