Discord is actually pretty cool for kids
Been nervous about my son joining Discord for his school robotics club but checked it out and... it's actually way better monitored than I thought? He can't add random people, the club moderator is pretty active, and I can see the chat history. The kids use it to coordinate meetings and share project updates. Anyway not saying it's perfectly safe but definitely seems like a legit tool for his age (13) rather than the cesspool I assumed it was. Pleasantly surprised.
This is actually good to hear. I've been the same nervous parent about Discord but if the club moderator is actually present that changes things. Does your son actually like the robotics people or is he just on it for the club?