We are using portals. I made a Survey123 form using the pull data function to pull HR data from the HR service. When new users tried to use the form, the pull data doesn't work while the existing users can pull data. So I made a form without pulling data, and they can submit data. So it looks like the portal connection is working.
Today I tried to test the user's Survey123 with the test portal, then realized I can't add the test portal to the user's Survey123. When I add the test portal, the portal name should be "Test Portal" but in his Survey123, it's "ArcGIS Enterprise (https://.....the test portal URL...), and when I tried to sign in to the test portal, it leads to ArcGIS Online login.

Are these two separate problems? Or the forms can't pull data because of the portal connection?