Sorry about that,
I had a similar case with my s10lite bought from UAE , i had to change ROMS to the spain version. For some reason spain receives updates much faster than any other country. I just updated to oneui 2.5 yesterday and i live in Tanzania.
A quick trick:
Try using then smartswitch app in windows. Download it > install it > plug in your and wait for it to scan for updates. You may be surprised to see an update already available.