WordPress.com supports embedding 360° photos via the following shortcode:
[vr url=path-to-photo.jpg view=360]
You can add a shortcode to any page or post using a shortcode block.
This will embed the 360° photo in a viewer that lets users explore the image in the browser, via Google Cardboard, or using VR headsets like Oculus Rift, HTC Vive, or Google Daydream.
Here’s an example: