Parallax scroll "menu"

There is no parallax effect on the site you link to. Only a fixed background image.
Parallax effects are, AFAIK impossible to achieve in Figma.
Fixed backgrounds are doable to an extent.

Here’s the setup needed to achieve the chosecommune design:

The fixed background is a child of the outer frame, with the inner frame above it. The inner frame is the same size as the outer frame, positioned right on top of it. The inner frame must not have a fill-color. The solid background is the background that covers the fixed background in the outer frame.

great, thanx so much! Going try do it 🙂