The tbh app basically has you add your friends and then asks you questions like: who's really good at being a friend? You choose someone, and it tells them someone said it about them, but not who did. Anonymous compliments. One of the few apps I know which actually tries to create a positive vibe. It has a network problem, though; most people aren't on it. I wonder if a similar thing could work where your friends are those you follow and are followed by on Mastodon? Could be lovely.