Force to display Guardian system

Im doing a small VR tutorial Level where i explain the user how to move with VR. At some point i got a voice explaining everything to the user and i want to force to display the guardian system. The voice is talking about the security and that user should fell free to move until the guardian system is not displayed. So at that point i want to display to the user how the guardian system looks like. I try several approaches but cannot make it work, to force to display guardian system in Unreal 5.

Thank you.