Samsung Tab A 2015 9.7 SM-T550 for /e/OS R-1.15
[e-1.15-r-20230912-UNOFFICIAL-gt510wifi.zip]
https://www.androidfilehost.com/?fid=10620683726822078585
Please see sources and install instructions including recovery here:
https://forum.xda-developers.com/t/unofficial-rom-beta-lineageos-18-1-for-galaxy-tab-a-sm-t550-aug-14-2023.4305889/
Use it at you own risk!
Please support the developer(s)!