Samsung One UI 3.0 user interface featured with Android 11 has recruited Galaxy M31 for beta preview in India. Anyone who has subscribed for the beta preview program can search for the firmware version M315FDDU2ZTLF update in Settings.
yeah... seems like have to be waiting though... by the way.... One UI 3.0 stable release packed with Android 11 will be delivered to A70 in March 2021 according to Samsung's firmware update schedule.
I guess, the Indian variant may have this update. But not 100% sure since I don't own an M31.however, I tested with Indian A30 against Vietnam A30 when One UI 2.0 was released and the Indian variant got the update early as expected.