How to add context menu item for files in general, in Windows?

Question

in order to add context menu for directories and explorer background, one can follow instructions here.

To add context menu for specific file extensions, one can follow instructions here

but I can't seem to find a way to add context menu items for all files?

Answer 1

According to your description, I looked on the internet and found a solution similar to your problem, you can refer to it. Add Search Everything context menu item to all files