Welcome to 3D pages
I open the SharePoint site of team "Algebra 1." I press "+ New" and click "Space."
I give the space name and the description. I press the "Create" button.
I press the "Terrace" button.
I open the "Background" tab and select "Image."
I open the mountains picture.
I press the circled plus click the web icon in a new window and select the required document library.
We obtain the 3D page on the site. To get it as a tab in Teams, I add the SharePoint as a tab and this action opens the required 3D page. A good introduction is shown in the video below.