Hi,
UDIM does not work with Tessellation.
Similar problem is in Unreal 5. When using Modelind plugin then Displacement function. It is not possible to connect virtual texture that supports UDIM.
Will this be fixed. If you use UDIM it is because the model is too complex to be textured with one texture. In this case, the inability to use Tessellation and Displacement in Unreal 5 is a serious limitation.