Pano images do not appear 3D on facebook

Since I bought Iphone13 Mini with updated iOS 15, I tried many times over many days but I have not succeeded to post any pano photo on facebook. Taking pano pictures seemed OK from my iPhone. In the Photo Library, they appear to be valid pano images. Posting them on facebook by clicking "make 3D" option looked promising. But after the process was completed, the image always appeared flat horizontally on facebook. No 3D view with that usual animated global icon.

Today I can still post old pano images taken with my older 5S iPhone  (transferred to my current iPhone 13 Mini) and they appear 3D view on facebook.

Advice would be appreciated.