Other comments are completely hidden, but I can reply to the original post.
Tried on Chrome mobile and Chrome on win10.
HOWEVER! I just tried on the Brave browser and on Windows Edge. I did not log into my account on either of those, so I can’t say anything about notifications, but everything else is fine on both of them. Perhaps this is a Chrome-specific bug?
[Update] I logged into Kinja through the Brave browser and discovered that notifications work.