Most data standards for digital twins are nowadays done in OWL2. To have a repository, this can be mapped to Eclipse Modeling Framework. I know how to work directly with the open source implementations of both, but you may as well contact a vendor in the domain.
Enterprise Architecture Management (EAM) solutions are designed to help organizations effectively plan, design, and manage their enterprise architecture. These tools provide a comprehensive view of an organization's business processes, IT systems, and their relationships, enabling better decision-making and alignment between business and IT strategies.
That is a very wide field.
Most data standards for digital twins are nowadays done in OWL2. To have a repository, this can be mapped to Eclipse Modeling Framework. I know how to work directly with the open source implementations of both, but you may as well contact a vendor in the domain.