might be an accessibility issue, the iOS elements should be defined as accessible for appium to view them.
try to look at this: Ios: Can't see Elements I can interact with
and also: https://github.com/appium/appium-desktop/issues/1818
as well, you can try to increase the snapshot. see: https://github.com/appium/appium-xcuitest-driver#desired-capabilities:~:text=animation%20checks%20completely.-,snapshotMaxDepth,-int