The first video here is a bow made out of mostly wood and PVC pipes.
The 2nd video here is made of wood laminates, zinc and more. The maker goes into detail as to the building materials at the end of the video.
The 3rd video here shows a guy who made a bow out of wood - and he shows the process he uses for attaching the 2nd cam on the top of the bow after his 1st attempt at making compound bow with only a bottom cam fails. (For some unknown reason he designed the bow to shoot off a right side arrow rest when it should properly be on the left side.)
Some of the wooden compound bows shown below are made in a factory, but very few compound bow manufacturers use wood these days. If you go looking to buy a wooden compound bow the easiest way to do so is to buy an old one made in the 1970s or 1980s.
At the very least the videos and images shown here should give you some DIY ideas if you want to design and make your own wooden compound bow.