I used to be a lurker of r/C_programming where people would ask questions and get answers. It mostly consisted of students wanting to get a human answer to their problem.
I liked chiming in there and answering from time to time. Although you always had that one student who ordered to do the homework for them, there were some nice and helpful interactions in that subreddit.
Would people be interested in a community focused around helping each others in programming? Or would this very community do the job already?
I would suggest looking into subscribing to and engaging with communities from the programming.dev instance. While they continue to exist, and Beehaw is federated with them and vice versa, Beehaw users like you and me can do so!