Interactive UI on VR Spectator Screen

I was looking to an interactive UI Widget to the VR spectator screen though don’t seem to be having luck finding anything about it other than several unanswered questions from the past couple years. Seems one workaround is to forgo the spectator screen entirely and instead use another player. I skimmed release notes since 4.17 when the spectator screen was added, and nothing referenced updates. Anyone find a solution? Or is it best to go with an alternative workaround?