Check if you have SM-T560 and not SM-T560NU. If you have SM-T560NU you can install LineageOS 18.1 Android 11.Hello. I have flashed twrp3.
I have tried to install viper os V5.1 but it fails. It is a message in red.
I have done : Select partitions to wipe : Dalvlk Cache, System, Data, Cache.