I'm sure Biden barely recognizes anyone, even if he's told who they are and given a picture of them (which is common in Presidential and high leadership position briefs), HOWEVER, he was most likely also told by his handlers to not bother shaking Sunak's hands or to marginalize him because a lot of world leaders seem to be doing this with the UK leadership. Unless it's Charles who's meeting them.
Also, Biden is supremely and truly a racist human, so there's that, too.
I'm sure Biden barely recognizes anyone, even if he's told who they are and given a picture of them (which is common in Presidential and high leadership position briefs), HOWEVER, he was most likely also told by his handlers to not bother shaking Sunak's hands or to marginalize him because a lot of world leaders seem to be doing this with the UK leadership. Unless it's Charles who's meeting them.
Also, Biden is supremely and truly a racist human, so there's that, too.