Hi @PeterBarber , this isn't a feature built into StoryMaps, but we have seen people embed 360º images into their stories. To do this in an immersive element similar a map tour, you could use a sidecar element, create a map, and add those 360º images into a feature layer's data. This blog post does a good job of explaining that process: How to create an ArcGIS Online map with 360° images .
The other option is to simply embed 360º images in your story, if you don't need your user to be focusing on a map when viewing the images. @PeterKnoop put together a story of different places you can add 360º images, and a few examples of different sites where you can create and host those images. 360º Images and 3D Models in StoryMaps .
Let me know if these workflows provide a possible solution for you!
--Abby