Intune Microsoft 365 Apps Panel

On the Intune Microsoft 365 Apps panel of the New Catalog Item Wizard, which opens if you select Intune and then Microsoft 365 Apps on the Software Source panel, you select the Microsoft 365 Apps application that you want to add to this catalog item.

Therefore, to search the entire Intune instance for a specific application, you need to use the ID, Display Name, Publisher, and Owner column filters.

Click on the application that you want to associate with this catalog item and click Next to continue.