Hello,
I also have an issue with this feature. I'm using Unity and for me it works fine for passtrough.
My issue if when the image displayed is 100% VR, when moving the head left to right, i see that the passtrough image is in the background and it gives me some white "screen borders" (possibly asynchronous spacewarp issue ?)
in the video it's SteamVR home but in any custom game made, the border issue is the same.
(sorry for the quality, i have no dedicated "trough the lens" setup)
Best,
Yoirgl
20231010_133344.mp4