It seems I can nolonger use the same shortcut for multiple panels since updating to Premiere 25.3.
I'm specifically trying to get the zoom-to-fit shortcut working how it used to. In 25.2.3 and previous versions, I was able to use shift+z to zoom-to-fit the program monitor, the player monitor and the sequence panel all with this one shortcut, depending on which panel was selected. Since updating to 25.3, in the keyboard shortcuts menu, these functions are now all listed under "Application" as opposed to under the various panel sections, meaning Premiere now tells me "that shortcut is already in use by another function" when I try to fix this problem. It now wants my to use three different shortcuts for what was previously one. I sincerely hope this is a bug and not a concious decission made by Adobe.