One thing that I actually do like about using an iPad with a mouse is the spell check.
PC’s typically follow the model of right click → menu → suggestions or right click → suggestions on top of the context menu. Where the particulars of everything are application specific and very non portable, usually.
My iPad? Click the word → just give the suggestions and make you click again for the menu. Subsequent clicks toggle between spell check suggestions and the menu. Android usually just opens a context menu when you click the word, and keeps text selection different from spell checking. +/- some OEMs like to disable that by default (and Samsung used to remove the feature, way back when), iOS and Android mostly make it the OS’s job for text input things.