When replacing a component you select the component to be replaced, then it gives you a useless list of parts you have open. Usually you want to replace one screw for another... Library parts. No matter just remember in your mind what part it was. I mean you have a computer, but use human memory because the UI won't let you pick something already in the assembly for example and good luck trying to copy paste. Using PDM, it drops you into the file manager... But if you want parts from the PDM system, why not use the specialized sear menu which is a separate click away? Sure, you could just type the name of the part, but nah, lets have this extra blocking menu, and then type the part.

I suggest to go to chat GPT and have it barf a new UI.