Can you embed another application webui on WP?!

Hi, I'm selfhosting wp (study) and I have an application that is webui accessible as well on the same network and wp.

Is there a way you can somehow embed that the application is contained/within the wordpress OR when clicking to access the application web the request is only between the app and wordpress and not going outside to public since I don't want app accessible outside just the wp page.

Any advise would be greatly appreciated!