MidAtlanticFoil said..
If you have any surfing or foil surfing experience, I like to pretend I'm high lining down a wave backside and then do a cutback to the power source of the wave. This sort of visualization can help breakthrough that wall of turning downwind through to the other side of the wind window. Helps commit to the turn/carve. Dealing with the wing is the other half of the equation haha
To add to the Gold advice above. Come in with controlled speed, lift the wing above you and ride the foil as though you don't even have a wing. Concentrate riding the foil, forget about the wing.
even if you spend a session riding the foil around on the gybe, with wing held horizontally above your head but sink and fall down before your engage the wing - eventually you will add the wing reengagement part and the timing required.
Even try the above and add a slight pump as you travel around this can eventually give you that extra glide needed to then reengage the wing power.
A lot of times now I actually flag the wing completely and pump around the gybe. Good practise for entering waves and also if winging in moderate wind conditions.
but yeh get that wing above you and ride the foil only around the gybe, is the key because that is what we forget to do - worried about that damn wing. Wing is only there as a means to generate enough power to foil!