Update

[MustafaAltay]

İ live in Turkey, and my tab s8 ultra didn't get the one ui 5.1 yet. What could be wrong?

[Dolgogi]

Hello @MustafaAltay
Unfortunately there's no way of knowing, as this Samsung Members community is for Australia.

Your best to contact Samsung in Turkey to find out about the release schedule there.

I think this is the Samsung Members for Turkey:
https://r2.community.samsung.com/t5/Turkey/ct-p/tr