One of my pet peeves is that there is no universal equivalent of a context menu. There’s long press, there’s the share button that is often used not just for sharing but for all kinds of context-menu-like functions, there are other buttons or hamburger/ellipsis menus, there’s the swipe left/right on an item with additional actions appearing and sometimes a “More…” secondary menu, there’s the text-edit “tap a selection and wait for a second or two for some options to appear”, and so on. The respective menus that may or may not appear also differ in their looks.

The lack of a uniform UI pattern for what is right-click on the desktop already surprised me way back in iPhone OS 3. Long press would have been the obvious choice, and you could have had a uniform context-menu function everywhere. Users would just learn “when in doubt, long-press for any and all additional actions” and wouldn’t have to try different gestures, look into the share menu or other random menu buttons.