I found this while browsing the demo site.
I am curious how to apply the function of moving forward scrolling while the background background is fixed.
demo site address: https://themes.muffingroup.com/be/photography2/
Please, open the section options where you want to achieve that, go to Advanced -> Background, choose the background image, and in the Attachment choose Fixed.
However, notice that Attachment Fixed does not work on the devices with iOS.
All resolved. Thanks for your help!