Generally the most stable and "complete" experience for this hardware. LineageOS 14.1 (Android 7.1 Nougat):
#LineageOS #SM-T210R #SamsungTabA #AndroidDev #CustomROM #KeepOldDevicesAlive #UnofficialBuild smt210r lineageos work
There is no current, stable, or officially supported LineageOS for that device. Find an old XDA thread if you want to experiment, but expect poor stability. Generally the most stable and "complete" experience for