Samsung Galaxy Tab S3 9.7 (2017)
Vendor Name: Samsung
Device name: SM-T820 (Wi-Fi)
Device CodeName: gts28vewifi
Version of Stock android 9-Pie - T820XXU3CTD5
Version of /e/OS: e-1.15-r-20230904-UNOFFICIAL-gts3lwifi by @ronnz98
Version of Custom Recovery: TWRP-twrp-3.6.2_9-0-gts28vewifi by @Awesometic
The device is Not rooted
My first clean fresh installation via adb sideload was aborted by TWRP with the error message:
Patching system image unconditionally…
Updater prozess ended with signal: 7
The second clean fresh installation via TWRP > Install *.zip on the other hand booted immediately and the device could be set up 
A detailed review like this one will soon be available for the Tab S3 SM-T820 and SM-T825.