As typical with MS, they are pushing their version of Chrome, which is called "Edge". According to first users, they are making it extremely difficult and tedious to change away from "Edge".
You will now have to follow these instructions, which basically tells you to manually change "every" file type you want opened in a browser, to that browser, as they all default to "Edge" now. No more simple one or two clicks to change your default browser, sorry.
But not to worry! I'm sure THIS will be the last version of Windows, right?
Instructions for Windows 11 users