I have the following search in a bookmark:
This is equivalent to the Stack Overflow search
intags:mine is:question answers:0 closed:no and then selecting the Newest tab.
Today it hasn't been updating its results. Nothing newer than 5 hours ago is being returned.
I just tried again, now it's only 1 hour behind.
It's up-to-date now (2021-06-21 21:57 UTC).