360 exif metadata

[HikeAndMap]

I shoot a series of photos at the same location around me.
the directions are
0, 45, 90, 135, 180, 225, 270, 315 (8 photos in total)

now I can upload them to Kartaview but in the plugin the option for (360) is greyed out.

So then I stitched them together myself for a nice 360 stitch - but again - no 360 and also on the website viewing the photo doesn't show a nice "round photo" but a flat 2D photo which is just extremely wide ...

I tried:
https://facebook360.fb.com/editing-360-photos-injecting-metadata/
&
https://developers.google.com/streetview/spherical-metadata

more specifically I tried:
exiftool -ProjectionType="equirectangular" photo.jpg
doesn't work

tried then:
exiftool -FullPanoWidthPixels=6000 -FullPanoHeightPixels=3000 -CroppedAreaLeftPixels=0 -CroppedAreaTopPixels=783 -CroppedAreaImageWidthPixels=6000 -CroppedAreaImageHeightPixels=1433 -ProjectionType=cylindrical file.jpg
doesn't work

I tried then:
exiftool.exe -FullPanoWidthPixels=23070 -FullPanoHeightPixels=11535 -CroppedAreaLeftPixels=0 -CroppedAreaTopPixels=4450 -CroppedAreaImageWidthPixels=23070 -CroppedAreaImageHeightPixels=2636 -ProjectionType=spherical file.jpg
doesn't work

The real problem is however - there's no information online on Kartaview for us contributors and software developers what kind of tag/requirements we have to set for this to work.

Would you be so kind to share this information?

Especially since close to me is a REGULAR photo series - a photo series from totally different locations and thus absolutely NOT a 360 photo - where I can select "360" in the plugin and on the website but that's utter nonsense of course since that series of 5 photos is completely NOT a 360 .

https://kartaview.org/details/3423697/520/track-info (from someone else, NOT 360 even complete different locations - but can be selected as 360)

https://kartaview.org/details/3843253/7/track-info (1 test upload from me with single photos all at the same location rotation as 360 but doesn't work)

https://kartaview.org/details/3845753/0/track-info (Stitched 360 with the exif metadata I described but whatever I try doesn't work)

I'm really looking to get some solid data here since I'm working on an application for users to ease Mapillary on the desktop for everyone and get a bit more accurate data online - but I can't seem to find any information what's needed for Mapillary to recon 360 as 360

Thanks for the support