MDG EAM install dismantle

Team

we understand that mdg has a functionality to perform ie4n functions from mdg. We want to know if a technician in field is to perform ie4n in s4hana system ie say install a serialized equipment from a storage location , would this mean that inventory would also need to be replicated in mdg for those serialized parts and updates to equipment will then go from s4 to mdg?

Technicians won't have access to mdg but would perform installation in s4hana backend

Appreciate any inputs.