At least there will be no more talk of an “imminent” invasion until the two meet. Neither side is going to concede anything until they need to and then it will be in the form of a compromise in which both sides gain or can say they have gained something. Ukraine will be satisfied with anything that gives them some guarantee of security.
Russia giving the impression that they are preparing to invade (they know every movement of their troops is subject to satellite observation)is part of the diplomatic manoeuvring and the US will know this.
Interesting that Britain has been excluded from the negotiations over the breakaway areas, in which the Western capitalist bloc will be represented by France and Germany who have more to lose from the economic fall-out of any invasion. In any event, what Britain might want won’t come into it, not that it appears to be any different from what the US tells them.