I saw the GIS Day 2022 Forum, and my first thought was "we have forums on here?"
I think it's nice to have topical, informal spaces for sharing and maybe a bit of showing off, too. I know it's already the 7th, but it's not too late to get folks in on the #30DayMapChallenge happening elsewhere across social media!
https://30daymapchallenge.com/
Or maybe if it's not for this particular event, just having a "share your cool maps" space that users could post to would be a neat way to build community outside of the typical "informal tech support" that this space is known for.