The Service Manual seems to imply there are more than one.
For removal it says "When removing EGR upper tube assembly being careful not to drop the silicone rubber seals
in the intake manifold"
For installation it also refers to more than one.
But this online parts site only shows one tube seal, number 6.
The pic is for a 2.7L, but I think they are essentially the same.
These online parts diagrams are not always accurate, especially for seals and gaskets.