The position, rotation and local scale of a game object can be shared between players using AXRPSharedTransform component.
Add AXRPSharedTransform component to a game object.

Shared game objects can be grab interactable of XR Interaction Toolkit. AXRPSharedTransform automatically handles a player’s interaction on the grab interactable.
Show Game Object To Only Some Players
onAirXR Playground Technical Overview