Forum Discussion
Excel live does not scroll anymore since a week or so - Firefox 114 and 120, Linux
Feedback portal which is monitored by Microsoft is here Excel · Community (microsoft.com)
Or in Excel for web Help->Feedback->Report a problem.
As for an issue, I'd try to sign-out from all opened in browser Office apps, sign-in again, first in incognito mode.
In my case scrolling works, I'm on Vivaldi.
It would seem the document I was trying to scroll has a large number of frozen rows at the top. What changed is that zooming out with ctrl-minus used to make the text smaller but also the line height in the spreadsheet was smaller so you could see unfrozen lines. Now the line height stays the same and you are locked out of the spreadsheet if you don't switch.. Monitors..! Thanks SergeiBaklan for the advice, I will try to echo this in excel feedback too.