I have the exact same issue. It appears this is a known issue, and has been reported for at least the past year, and Blizzard has yet to respond. That’s what my research for an hour or so had shown.
On my side, I had Blizzard remove Parental Controls from my account completely. I also checked any privacy settings on Steam. Of course, I tried disabling/enabling all relevant settings within Battlenet and Diablo 4 itself.
Can this issue get a response?