Samsung is already actively testing the One UI 5.0 skin based on Android 13. The beta version has not yet been launched either publicly or in any closed version, but Samsung employees already have access to it.
The beta version for regular users will be available very soon: next week. But it is not yet clear in which countries it will initially be released. As for the stable version, it is expected to be released along with new folding smartphones either at the end of August or at the beginning of September.
Unfortunately, while all sources say that One UI 5.0 will bring mostly cosmetic changes.