Wood products have a long history in aviation even though modern materials have eclipsed them in many areas. But lately we’ve noticed several plywood satellites, including this one the ESA plans to launch. The WISA Woodsat is a test of WISA plywood, a particular brand made in Finland to show how it can withstand the orbital environment.
Why not? Plywood is cheap and easy to form. You probably don’t want to make a pressure vessel with it, but most satellites don’t need that anyway.