ᐅ Ring beam for garage with XPS insulation: should it be applied only on the outside or also on the top?

Hello everyone,

I am currently in the process of ordering wood fiber panels for our garage in EL.
Now I am wondering whether the panels should be insulated only on the outside or both on top and outside. For a well-known manufacturer (Lo..Elem..), there is, for example, a model called "GRA," which is intended for use in gable ends.
Image:
Red – insulation above the ceiling is applied
Then green, green, blue, or only blue as insulation in the ring beam