luckily europe doesnt have any native marsupials. since the likely origin of marsupials is likely SOuth america(there are ancient lineage of marsupial there) the diprodonts(australias) diverged likely when the continents were all still connected.

another fun fact is S america was so unique had its own order of mammals until the interchange. sprassadonts(marsupial-like), liptoterns,,,etc, giant armadillos, giant ground sloths.