I want to add my portal SharePoint (on-prem) to Microsoft Teams as the app does not tap, I am using appstudio app for that but when all steps are complete, the portal does not show (empty page)
although my SharePoint portal authentication is office 365 AUTH (AAD).
Thanks in advance.
Any advice?
There is an entire framework for doing this now in Teams, if this is for an "intranet" type of experience, called Viva Connections. See more here. It essentially embeds your SharePoint intranet into Teams for everyone in your organisation.
If you're wanting just any SharePoint page to be embedded as an "app" experience, I think you need to use a URL that tells Teams what you're trying to do. I've not tested it, but try the steps in this blog post. Specifically notice step 11:
Update: I didn't read the original post correctly, that this is on premises SharePoint. Not sure if the above will work, but it's easy enough to try it out, and let us know here.