Plab 2 is taken in osce centre and not in hospital setting
Plab 2 trained actors are very less (may be around 40-50), they can’t be circulated in the whole world.
Plab 2 testing centre has high fidelity mannikin as simman from cae health care usa, which costs around 35000£ with high maintenance cost. This logistics cant be delivered all over the world.
Gmc id check is also done before plab 2 exam, so even if international centres are opened, you need to travel manchester just for id check.
Hope that clarifies