Tor Services on Umbrel

Does Umbrel create a hidden Tor service for every app that runs on the server? I’ve found that I can connect via Tor to apps like Thunderhub by finding the onion hostname located in the /home/umbrel/umbrel/tor/data/<app-name> folder. I’m interested in using this for an app I’m building but also wondering why Umbrel creates this hostname by default for every app? There are instances where I might want to disable the onion service for certain apps.