Hi @mpezzutti ,
Could you please share a bit more about your scenario?
Do you want to list alll your shared apps within a Gallery control in an app?
If you want to list alll your shared apps within a Gallery control in an app, I think the "Get Apps" action of PowerApps for App Markers connector could achieve your needs.
I have made a test on my side, please take a try with the following workaround:


Add a Gallery control, within your app, set the Items property to following:
Filter(PowerAppsforAppMakers.GetApps().value, properties.sharedUsersCount >= 1)
Then within the Gallery, add a "Launch" icon, set the OnSelect property to following:
Launch(ThisItem.properties.appOpenUri) /* <-- Launch the specific canvas app */
Within the Gallery, you could also add some Label controls to details of your apps, set the Text property to following formula:
"App Name: " & ThisItem.properties.displayName
"Shared Users Count: " & ThisItem.properties.sharedUsersCount
....
In addition, if you just want to show all apps shared from yourself within above Gallery, please consider modify the Items property formula within the Gallery as below:
Filter(
PowerAppsforAppMakers.GetApps().value,
properties.sharedUsersCount >= 1 && properties.createdBy.email = User().Email
)
More details about the PowerApps for App Markers connector, please check the following article:
PowerApps for App Markers
Best regards,