I ask the same question. "Може" is used for "maybe" & "perhaps" in Ukrainian too.....thank God this os only a Beta version on Ukrainian Duolingo! I can't wait for the 'upgraded' version.
(I know it's not easy for the developers to be 'on the ball' & keep the Ukrainian Duolingo version consistently updated. That's why there are some wonderful people within Duo AND knowledgeable students here to help out with suggestions.)
Я дякую вам всім за ваш труд і поміч! :)