As per rumors, the update will come soon because this update’s first shows on the Samsung servers. As per Samsung servers, the first firmware development for the Galaxy S21 FE was shared on Twitter by @tarunvats33.
It may be possible that the Galaxy S23 series is the first one which gets this update. From past years’ records Galaxy devices most of the time get the updates on time.
At last, as per rumors the expected date for the update is June 5, 2023.