The risk reward of doing that isn’t great. Ukraine is unlikely to end the war sooner using the current western weapons against long range targets in Russia. They will need a recurring supply. If they blatantly ignore the terms of the weapons they have already received then they won’t get anymore.
Best case scenario, Ukraine gets the go ahead and we hear about it after they start using them. But Ukraine won’t use them without permission, it’s too risky. If (hopefully when) they get permission it will be alongside a large delivery of these weapons.