SPFx Teams Applications load in Teams but not in the Microsoft 365 App on iOS

[StfBauer]

Target SharePoint environment

SharePoint Online

What SharePoint development model, framework, SDK or API is this about?

💥 SharePoint Framework

Developer environment

macOS

What browser(s) / client(s) have you tested

• 💥 Internet Explorer
• 💥 Microsoft Edge
• 💥 Google Chrome
• 💥 FireFox
• 💥 Safari
• mobile (iOS/iPadOS)
• mobile (Android)
• not applicable
• other (enter in the "Additional environment details" area below)

Additional environment details

IOS Version: 18.1
Microsoft Teams Version: 6.21.0
Microsoft 365 App: 2.91.1

Describe the bug / error

When an application is deployed as person teams app it loads fine in Microsoft Teams as intended:

The same application is also listed in the Microsoft 365 App on iOS, when the user clicks on this application the only thing that shows is a loading animation. It stays there forever and do not load the application or raise any issue or timeout:

Loading in the SharePoint application works without any problem.

When the application is installed in a local app catalog and the Teams manaifest points to this installation everything works "fine" in the M365 Application too. Not in case of global deployment. The only thing that happens in a local, site collection app catalog the user will be asked to authentication, like you would normally access SharePoint the first time.

Steps to reproduce

1. Create a blank React Web part with sample content
2. Deploy to SharePoint
3. Deploy to Teams
4. Add and opent the app as personal app in Teams on iOS
5. Open App in Microsoft 365 App on IOS

Expected behavior

Apps not get provisioned to the Microsoft 365 App or load appropriatelely.