I tried to export a running behaviour (Animation, door permanently open and close) from Creative Experience as described in "3DE User Assistance" in glb-Format for using in a other Application. I tried to import the glb-result from 3DE into Blender. But there i received only the 3D-Geometrie, no Animation.
Has someone from you exported successfully an animation from 3DE/Creative-Experience into other Viewer (for example AR-Viewer?) 
I tried it with 3D-Experience 2021x Hotfix 14 (On Premise)
THX for a tipp/answer!