I gave it a try if I can adapt and build for LOS20 using LOS21 sources from retiredtab. I could build using LOS-UL sources…now it just has to work 
Samsung Galaxy Tab S 8.4 WiFi (klimtwifi) SM-T700 / Samsung Galaxy Tab S 10.5 WiFI (chagallwifi) SM-T800 / Samsung Galaxy Note 10.1 Edition 2014 (n1awifi) SM-P600 for /e/OS-T 2.6
e-2.6.3-t-20241230-UNOFFICIAL-klimtwifi.zip
https://sourceforge.net/projects/eosbuildsronnz98/files/SamsungSmartphones/e-2.6.3-t-20241230-UNOFFICIAL-klimtwifi.zip/download
e-2.6.3-t-20250102-UNOFFICIAL-klimtlte.zip
e-2.6.3-t-20250102-UNOFFICIAL-klimtlte.zip
e-2.6.3-t-20250102-UNOFFICIAL-klimtltecan.zip
e-2.6.3-t-20250102-UNOFFICIAL-klimtltecan.zip
e-2.6.3-t-20241230-UNOFFICIAL-chagallwifi.zip
https://sourceforge.net/projects/eosbuildsronnz98/files/SamsungSmartphones/e-2.6.3-t-20241230-UNOFFICIAL-chagallwifi.zip/download
e-2.6.3-t-20250102-UNOFFICIAL-chagalllte.zip
e-2.6.3-t-20250102-UNOFFICIAL-chagalllte.zip
e-2.6.3-t-20241230-UNOFFICIAL-n1awifi.zip
https://sourceforge.net/projects/eosbuildsronnz98/files/SamsungSmartphones/e-2.6.3-t-20241230-UNOFFICIAL-n1awifi.zip/download
Please see sources and install instructions including recovery here:
https://xdaforums.com/t/unofficial-rom-alpha-lineageos-21-for-sm-t700-dec-4-2024.4706316/
https://xdaforums.com/t/unofficial-rom-alpha-lineageos-21-for-sm-t800-dec-4-2024.4702769/
https://xdaforums.com/t/unofficial-rom-alpha-lineageos-21-for-sm-p600-dec-3-2024.4702764/
Use it at your own risk!
Please support the developer(s)!