Accept PoseHeadingDegrees as alternative to GPSImgDirection?

I have tried importing a number of pano sequences into GeoVisio, taken with various cameras, including the onboard Pixel 3 camera, and the GoPro Fusion.

I've noticed that most of my sequences have been rejected due to missing EXIF tags, particularly image direction but also occasionally date.

Should GPSImgDirection and date be compulsory? Image direction can potentially be added later (e.g. via a rotation facility on the UI and corresponding API call), and in any case I have used PoseHeadingDegrees to determine image direction so can that be accepted as an alternative?

As almost all my panos have PoseHeadingDegrees but do not appear to have GPSImgDirection, presumably PoseHeadingDegrees is better supported.