I share my hands-on experience with the Samsung Galaxy S3 SM-T825 (gts3llte) and LineageOS 19.1 build lineage-19.1-20220923-UNOFFICIAL-gts3llte by @Awesometic with the wish and hope that a /e/OS ROM builder can be found to build one, whether with /e/OS Q-10, R-11 or S-12.
With reference to my previous postings (see above), I can report:
T825 LTE
LOS 19.1-20220923 unofficial + FlameGApps-12.1-basic-arm64-20220920:
USB OTG works fine [contrary(!) to @Awesometic’s statement in XDA forum]; my Samsung USB 3.1 stick is recognised immediately.
LAN via OTG adapter RJ45 works fine.
QR-Scan option in Secure Camera (GrapheneOS) does not work.
QR scan option in SecScanQR from F-Droid works fine.
GPS works..
4G | LTE works fine.
S-Pen works fine.
Samsung Book cover keyboard via Bluetooth works fine.
Samsung Bluetooth headset works fine.
USB-C-to-USB-C headset works fine.
3,5mm jack headset via USB-C-to-3.5mm Adapter does not work.
microSDXC 256GB works as internal memory expansion (64 GB +256 GB = 320 GB) and as mobile memory 256 GB.
my SmartHome applications work properly.