There are lots of other regressive, mind-bogglingly inept changes scattered across the included applications.
One of my favorites is in Apple Music, where the transport controls and song-title display has been moved from the top of the window down into the content-browser or song-list area... where it's "transparent" and overlaid on other text or album art.
In Mail, the "get new mail" button has been REMOVED from the toolbar. WTF? WHY? So when you're awaiting the ever-more-widespread 2FA from something you just logged into, you get to dig through a menu to hurry up retrieval or re-add the button to the toolbar (which casual users are not going to know how to do).
The utter stupidity of these flailing, desperate changes should concern every computer user. Microsoft is lost, and Windows a clinic on dereliction, design incompetence, and hostility toward users. That leaves Mac OS as the only tolerable consumer computing platform... and it has taken a profound turn for the worse with Tahoe.
And all for nothing. Apple's blunders here don't make sense from any perspective.
In Mail, right click on the toolbar and choose customise. Put the "get mail" action where you want it.
Thanks. I noted in my comment the option to re-add it to the toolbar, but everyday users can't be expected to know this is possible or how to do it.
Nor should they have to, given that mail retrieval is something that everyone can logically be expected to do if they're told they were just sent a message.
People who want to click a button to skip waiting for the next mail poll time (and who even know what that means!) probably can be expected to know that just about every toolbar can be customised.