This may achieve what you're looking for: https://discussions.apple.com/thread/6605847?answerId=26864942022#26864942022
Copy and paste from the above link:
It's pretty much impossible to get the complete iCloud Drive folder in
your dock. I did, however, find out how to add just the folders from
iCloud drive that I manually added. It's a bit of a ...
So, I don't know if this will work always, but I found one workaround:
Switch to the non-showing instance of the app.
Switch to another instance of the app that shows.
Put this app in full screen
Switch to the non-showing instance of the app -> now it worked for me.
I am not sure if 1-3 have to happen on the same monitor, I will keep trying this out in the ...
How can I get that context menu to display for icons in the downloads window?
The stacks were designed to be a quick way to open items in the folder. If you wanted to do anything more (copy, move, delete, etc.), you needed to actually be in a Finder window, thus the shortcut at the top which launches you into one.
pgAdmin 4 (/Applications/PostgreSQL 12/pgAdmin 4.app) is a simple launcher for /Library/PostgreSQL/12/pgAdmin 4.app which itself is some kind of a service wrapper.
Besides launching a small web server, it also starts the menulet "pgAdmin 4" (the black elephant) and probably does some other things too.
The recommended way to restart pgAdmin 4 is to quit the ...