Submission and Dominance are states of mind. You cannot give me your state of mind.
Submissives give consent and reliquish control.
I think you can 'gift' your state of mind. That very relinquishing, to my mind, is the gift. I suppose I can only talk personally but I have experienced it myself. I am struggling, not there yet, vanilla doubts bubbling away and my Master is orchestrating me patiently. There is nothing he can do to make me submit; I have to decide to relinquish myself to him. I want to, but I have to decide to. To give up everything - doubts, fears, unworthiness - just for the sake of him. If I can, and it takes strength, it feels to me like I'm giving him the sweetest thing he could desire. I give it to him willingly. He has allowed me to give it. It's more than just power exchange, it's the free giving of your most precious and vulnerable state to another who cherishes it.