Verb
look in on (third-person singular simple present looks in on, present participle looking in on, simple past and past participle looked in on)
To check that (someone or something) is okay or that a process is continuing appropriately; to check up on; to monitor (someone) through brief, often surreptitious checks.
Our sparkling new Frost Museum of Debatable Facts boasts not only the Instagram-ready aquarium from which you can look in on sharks, rays, and other tropical fish. Source: Internet
When the space is broadcast, non-VR viewers look in on the virtual room and send interactive comments. Source: Internet