The Samsung Galaxy A20 would be great if it was supported.
Will be difficult cause Galaxy A20 is not supported by LineageOS, if device is Treble-Enabled you can try to flash our GSI (Generic System Image), we need feedbacks to improve it.
Seems Galaxy A20 is Treble-Enabled because shipped with Android 9.0, am I right ?
For info, The Project Treble separates the operating system from the manufacturer’s drivers, allowing to install another Android ROM (called GSI) without having to modify it to add the drivers as was the case with Android before Oreo.
TWRP : https://eu.dl.twrp.me/a20/
@sourceforge.net/projects/eurekaroms/files/Samsung/A20 : e-1.10-s-20230406-UNOFFICIAL-a20.zip