Is there a online teaching platform where the students can't privately message the teacher?

I would like to know if there is a platform for teaching students where the students can't privately message the teacher. They can only ask questions publicly, whether it be on a public post like a forum, a virtual meeting or something along these lines.

Submitted October 24, 2021 at 11:10PM by Far-You3652 https://ift.tt/3m9Gi68