Thank you for reaching out to us. As I understand you are looking for information on my apps portal.
My Apps is a web-based portal that is used for managing and launching applications in Azure Active Directory (Azure AD). To work with applications in My Apps, use an organizational account in Azure AD and obtain access granted by the Azure AD administrator. My Apps is separate from the Azure portal and doesn't require users to have an Azure subscription or Microsoft 365 subscription.
Also there are few application properties which can be defined for an application affect how user interacts with it in the My apps portal.
Enabled for users to sign in? – If this property is set to Yes, then assigned users are able to sign into the application from the My Apps portal.
Name - The name of the application that users see on the My Apps portal. Administrators see the name when they manage access to the application.
Homepage URL -The URL that is launched when the application is selected in the My Apps portal.
Logo - The application logo that users see on the My Apps portal.
Visible to users - Makes the application visible in the My Apps portal. When this value is set to Yes, applications may still not appear in the My Apps portal if they don’t yet have users or groups assigned to it. Only assigned users are able to see the application in the My Apps portal.
Refer to these articles for more information related to My apps portals -
https://learn.microsoft.com/en-us/azure/active-directory/manage-apps/myapps-overview
https://learn.microsoft.com/en-us/azure/active-directory/manage-apps/access-panel-collections
Let me know if you have any questions.