I have a Magic Mouse, although I seldom use it because of a personal preference for the Magic Trackpad, but I can tell you that it uses a standard USB A to lightning cable can be plugged into any USB A style port for charging. Additionally if you encounter a Bluetooth communications problem, or forget/neglect to charge, just plug it in and magically it become a conventional wired mouse that can be used as it is charging. If you aren't accustomed to using a trackpad, you will likely spend some time getting gestures set the way you want as well as practice to become accustomed to using them.
Since you are considering the Magic Mouse, you might also be interested in
Better Touch Tool which can program new and enhanced gestures or the Magic Mouse, Trackpad, Touch Bar, keyboard, Siri Remote, Drawings, or enable gestures on iOS devices to effect your Mac and is Big Sur compatible.
