First idea (priority): It's great that the list of sample apps is growing, these have been very helpful in the learning process (especially in the Power Apps Desktop scenario). However, could you please enable us to "Configure" which apps will be visible when an employee signs into the Power Apps application on their mobile phones? What I mean is, let's say we're releasing an app that we are sharing with everyone....that app can be buried in sample apps by Microsoft. Those sample apps can also be a distraction, especially if we want people to test the organizational apps (and the more sample apps there are, the higher the likelihood of distraction).
So.... Please consider giving the Global Admin, or SharePoint Admin, for the Office 365 tenant, the option of configuring which, if any, default apps are shown on mobile devices. (This would not impact other apps shared by others in the org, nor the sample apps in the UI of Power Apps Desktop/Web Builder, it just involves the apps that are authored by Microsoft and shown in the phone UI.)
Second sub-idea (bells and whistles): Looking proactively forward, as the list of shared apps grows, it may take extra time to find the app you're looking for in the list of apps on your phone. Perhaps we could introduce a "Group" option, where we can publish apps for a specific Office 365 Group, which would be permissioned just like Office 365 Groups are now. This way on our phone we'd be able to sort, or group by Office 365 Group. This will help us to find what we're looking for more easily. (Note: In this case, we might also need a default "Company" Group for enterprise apps.)