Did iOS 17 deprecate .reality file support?

I have various .reality files published on a website as part of a learning product, which I deployed Feb. 2023 using the latest Reality Composer at the time.

Users informed me that none of the .reality files will open on iOS 17, which I have confirmed. They still open fine on iOS 16.

On iOS 17 the QuickLook viewer says "Object requires a newer version of iOS."

What gives? Did Apple deprecated .reality, or are these designed only to work on one version of iOS only?