Correct. Ukraine isn’t a supported country and therefore you can’t earn BAT through Rewards at this time.
When you created this topic, the website would have automatically generated a template with some questions you were supposed to ask. It seems you deleted it for some reason. One of the questions is:
Are you in a supported region? (see here for list of supported regions)
Clicking the link would take you to https://support.brave.com/hc/en-us/articles/6539887971469-List-of-supported-regions-Custodial-payout-accounts
Countries are listed in alphabetical order. You would see that Ukraine is not on the list. Therefore you can’t earn.
That said, it may be possible sometime in the future as on chain payments releases. But there’s no estimated timeframe on when people can join. You can learn a bit more about that over at my topic and the links provided over at PSA: Current and upcoming changes to Rewards and Creators