ArcGIS Storymaps now allows integration of HEIC images directly, but the Map Tour bulk import still only allows JPG, PNG, GIF, SVG, and BMP as supported file types. HEIC image formats are becoming very common and implementing conversion solutions that don't strip location information and are readily accessible, particularly for teachers in an education environment, adds another layer of complication that doesn't seem necessary at this point. Please consider adding HEIC image support to to bulk import in the ArcGIS Storymaps Map Tour!