Is it possible to open a terminal using "open -a Terminal" and then send commands to that new instance, automatically?

Question

I'm currently creating an app for some co-workers to automate our process of starting/stopping our development environments at the push of a button using SwiftUI. I'm able to do what I need to but for one of the environments I have to run "yarn start" from a specific directory but trying to run that command via the application isn't working as there's permission problems since I believe it's the application attempting to run the exec, not the user. It also doesn't seem to have access to the $PATH variables, so my solution to this is to use a script to do what I need and pass the directory to the script, which still isn't working. I came across the "open -a Terminal" command and am able to open a new terminal as the user, but I'm not sure if it's possible to then send commands to that new terminal via the script. Can anyone assist?