Ciao @anon53600968 ,
like you, I do love 360 photos and also (especially) doing StreetView . This was my first big project: National Park of La Maddalena.
I know that there are different apps that are allowing you to take 360° photos.
The complex answer is HOW TO UPLOAD.them?
For taking 360 photos or great 4K 360° I bought an Insta360 X3 camera but others are available.
A 360° photo can be EASELY upload on google maps ONLY in selected places like existing POI.
More complex is to answer to “How can I upload a 360° photos in a generic place on Google Maps”?
There are some commercial = $$ software that are allowing to create Virtual Tours but are more professional tools that do not help to place a single photos.
May I suggest you visit the great forum on facebook named " Google Street View Trusted Photographers"
Here you will meet some people “Local Guide” specialized in 360° and StreetView like @potaro67 a great expert.
Please check also for Mr Dean Zwikel and his tool that is, as far as I know, the only one that can solve our problem .
Ciao
Marco