I hate to say this but after years of incubating - of he cannot make his way out of the egg by himself he will not survive. Sometimes a little intervention works but I find that is 2/10 times.
If you’d like after waiting a couple hours go ahead and remove the egg, bring it inside , dampen a washcloth with warm water and cradle the egg inside it, gently check if the bloody membrane has been dried up ... sometimes a chick will get “cling wrapped” by the membrane... never pierce a bloody membrane yourself or the chick will die for sure.
if the chick is free and just having trouble getting that last bit of hard shell off go ahead and gently and slowly millimeter by millimeter chip the shell away (stop if you meet with any blood) by pinching it with your nails. Don’t let the cracked shell poke inward or it could cut the chick.
but... sadly .. my strongest advice is to leave it alone. If it is strong enough to survive it will. If it is too weak to hatch - it’s too weak to hatch. It happens.