Forum Moderators are part of the CS team and handle reports from all the Blizzard forums. They enforce the Code of Conduct.
The Community Managers never ever replied every 10th post. Ever. I was there (on the forums, not at Blizzard) and knew them personally.
Blizzard has a long term issue with active communications. Around 2018 or 2019 they switched to posting only news, patch notes, hotfix notes, announcements. They collect feedback but do not engage here.
You won’t be seeing any change unless Blizzard changes their entire policy on it. You can read a well though out discussion of it all in yesterday’s thread on CMs and communications.
Start here and spend a bit reading.
Again, the Moderators enforce the Code of Conduct. The CMs are the SAME PEOPLE for all Diablo games. There is no difference in current people or policy.
The last pinned post is not even from the Diablo team. It is from Vrakthris who is a CS Forum Support Agent. You normally find him here Customer Support - World of Warcraft Forums He is awesome, but not part of the Diablo team. He was commenting on forum policy.