Regular disappeared. Should I reach out?

Hello! I've been streaming consistently for about 5 months, and I've built up a small community of regulars. I had one regular in particular with a long watch streak who suddenly stopped coming to streams. Obviously, I know I'm not entitled to anyone's views or time, so I didn't worry about it and assumed they were busy. But I recently checked my activity log and noticed their last watch streak now says Unknown User where their username should have been. Sure enough, I checked their channel and saw a message that said "This channel has been closed by the user".

I sort of want to reach out on Discord and ask if everything's okay, since this user has been a long-time (for me) regular. However, I'm not sure if that would be crossing a boundary, etiquette-wise. While I have some of my chatters added on Discord and a server for posting stream alerts and talking about games, I'm pretty much just acquaintances with them rather than actual close internet friends, if that makes sense.

I also definitely don't want to pressure them or make them feel bad in any way about unfollowing or stepping away from Twitch for personal reasons, etc. It's possible they closed their account while studying for exams, too. Idk, I'm just a little concerned for them and want to make sure they're okay, since they didn't mention anything and went from hopping into every stream within one minute of going live to totally gone. But I also don't want to be weird, since - well - we're not really tight like that.

Am I way overthinking this? Have any of you found yourselves in this situation? What would you do?