Thank you!
One of the eyes sometimes appears completely black, and at other times the phenomenon is like a glitch that infinitely stretches and distorts the object. I noticed that there is an answer here stating that currently mobile HDR is not available, and one can try using tone mapping instead. https://forums.unrealengine.com/t/meta-quest3-and-mobile-hdr-issue-on-unreal-5-5-4/2583003/2?u=_9528