In theory, in a vacuum, there's nothing really wrong with this ending. It was pretty obvious from early on that the solution to their conflicts was just a straightforward confession, and that's what we got in the end.
But the story put no effort into actually building up to the solution. The main character conflict for Minami was that she valued their friendship too much to do anything that she considered might jeopardize that friendship in some way, and Yuzu's was that she was hung up on the past and stuck in denial.
The last few previous chapters were emphasizing these traits and doubling down on them, not working through them or tearing them down. And then in this chapter it just drops them out of nowhere to give us an ending. Very unsatisfying. We needed to either see Minami work through her fear of losing her friendship with Yuzu and/or Yuzu come to accept the Minami that's before her now, rather than the one she pictures in the past. Ideally both. An ending with a simultaneous double confession from them would have been cute and very fitting imo. Ah well.