Use fuselage parts then tap on the rotate tool then a wrench icon will pop up click it and use the x y z buttons to move it over the wing wou want

The visible wings are fake. A mixture of fuselage blocks form the leading edge, top and bottom, then fuselage inlets (flipped so so that the inlet faces backwards and is sideways, inlet angle is used to determine trailing edge sweep, open end set to zero-height) form the trailing edges of the wing, ailerons and flaps. The control surfaces are attached to hidden rotators set to the various controls (roll, vtol, etc.) and often use pistons to extend slotted flaps out from the wing.

If you are really interested in learning how to make this stuff, the best way is to find one you like and take it apart.

this boi's flaps design might give you an idea