At my work we've been pushing users to switch over to the new Outlook and Teams to help identify issues before the switch is forced. Being unable to use the mousewheel to scroll through the calendar has ticked off more users than any other single change that I can recall (apparently we love our calendars more than I ever knew!). From what I've read about the code base of Word, I can only imagine there are complexities we just aren't aware of, but scrolling a pane/window being disabled due to web scripts seems like something that shouldn't be an issue to begin with.
I'm assuming that, as the desktop version is being absorbed in to the web version, the desktop app is essentially a browser window which loads the browser app if we're simplifying it. If so, how can JS/TS/etc not be implemented to handle a mousewheel event? TBF, I'm making unfounded assumptions here, so maybe I'm way off. Either way, please push to have this implemented, I'm afraid our user base is going to revolt and rise up, it's only a matter of when!