What YECs say about these fossils is that there isn't any way that a tree was gradually buried by sediments while still in its original environment.
So? In this case that doesn't say a darn thing. There can be changes to the environment.
There are, of course, other cases. If a tree is partly buried by a mudflow is that "original enviroment"? What about the moving of sanddunes? Lave flows?
Whatever YEC's are saying such fossils are possible as shown by both current occurances
and by the evidence that has been perserved (trees with roots intact in a soil base).