To publish a 360 panorama on Facebook, you need to prepare the file properly so that its resolution is 6000 x 3000 and then add the appropriate meta data for Facebook to detect that it is a panorama file. You can do research on google how to do it or use my simple method in photoshop for * lazy people.
* without lazy people there would be no progress in the world :)
Mavic Air 2 - Orignal file
1. Create 360 panorama
Take a panorama with the automatic panorama function using a DJI drone or 360 camera.
Mavic Air 2 - Edited in photoshop
2. Edit Your Panorama
In photoshop change the resolution to 6000 x 3000. You can also add missing clouds and improve the look and feel of your panorama.
3. Download my 360 panorama template
Download the file, unpack psd, open in photoshop, paste your panorama into the template, save as JPG and you're done.