Execute command as if in another open terminal window

Let’s say I have three Terminal windows open:

1. ttys001: the current terminal I am in. Current directory is ~
2. ttys002: current directory is ~/Desktop
3. ttys003: a terminal where I’ve SSH’d into a remote machine. The current directory on local machine is ~/test. The current directory of the remote machine is ~/abcdef

Is it possible to execute a command that runs as if it were in one of the other open terminals, but prints the output in my currently active terminal.

For instance, from ttys001, can I get the output of ls as if it were run in ttys002 and have it print in ttys001.

Can I also do the same for the remote machine I am connected to in ttys003 (ie get the output of ls ~/abcdef not ls ~/test.

Would be interesting in hearing how this would work for macOS and Linux.

Edit:
I am aware I am asking about "terminal windows" as opposed to the processes that are running in them. This is deliberate. The aim is to write a tool that can get the list of files/folders available to a user for each terminal window they have open. If a terminal window is actively SSH’d into another machine, then I’d like to get the files/folders in the working directory of the remote machine.