To access the dashboards in Catalog as you would an app on your phone or tablet, use the Add to Home Screen feature. It launches in full screen mode, can be switched with other tasks, and supports the device's default orientation.
For more information see these articles:
https://www.howtogeek.com/196087/how-to-add-websites-to-the-home-screen-on-any-smartphone-or-tablet/
https://developer.chrome.com/multidevice/android/installtohomescreen
For more information about dashboards in Catalog, refer to Dashboards in the online help.