There never have been any options when pressing and holding any of the navigation buttons (unless you count Google/Gemini when pressing and holding the home button). I don't know what kind of context menu you are looking for, but your option for the back button is "back". What would you need in a menu that you cannot easily access otherwise? You can make a routine in conjunction with downloading Good Lock's routines + module where you can configure a button action to do certain things, but in order to show you what it can do, you have to state what you hope to accomplish.
