Open plugin window with shortcut

Yes, of course. I am not in the studio right now but you can use the search function in the key commands window. Something with “Instrument”… I have the letter “I” assigned on my keyboard - if I’m not mistaken that’s not the default key.
Anyways, it’s easy to find it with the search function.

EDIT: I is the default for Punch In. Here’s what you are looking for: