Microsoft Teams Widget Integration

My company uses MS Teams extensively for file storage, communication, and sharing. Our user base includes a limited number of members and a large number of guests. When attempting to add the widget to the Teams layout (my subject, client, etc), the widget only works for members and will not allow use by guests. In response, we have added as a website in the layout, but if a widget has been created by for Teams, I would expect it to work with all cohorts.