Hi Monique,
Good question. The introduction of the 'hybrid mobile app' profile is meant to define the user experience when building a hybrid app, which is something that you download from the google or apple app store. This is different than the 'phone' profile, which is what a user sees when accessing you app through the web at <yourapp>.mendixcloud.com. If a user logs into the app using a mobile browser, they would get the experience defined in the 'phone' navigation layout.
To build a different hybrid experience into your project, you can define a separate experience using the hybrid phone navigation layout. You are correct that tiere is not a 'hybridMobile' value under the $currentDeviceType enumeration, so you would need a separate page/microflow combo to drive functionality within the hybrid app.
Here is more information about the hybrid app development cycle if you are interested:
https://www.mendix.com/tag/hybrid-mobile-app-development/
I'd start here
Best,
Rob