potential work around:
New Document -> Quick Action.
Work flow receives no input.
Drag "Run AppleScript" over, then paste in:
- Code: Select All Code
tell application "System Events"
tell process "LastPass"
click menu item "Quick Search" of menu "Window" of menu bar 1
Name and save that as whatever then in
system-preferences - keyboard - shortcuts
your "quick action" should be available under "Services - General"
You'll need to make sure that "System Preferences" has accessibility toggled in "Security & Privacy" - "Privacy". Note, it seems to request permission for every app that it's triggered from. Not sure the solution for that, other than to always click the desktop somewhere so as to trigger from finder.