This issue appears to have been resolved in iOS 18.1 and Xcode 16.1. (At least in my app, it displays correctly.)

It seems that this issue still hasn’t been resolved in the official release of iOS 18. As mentioned in the original post, it appears to be related to a problem with TabView and NavigationStack. While using a Path-based solution does fix the issue, there are some instability concerns, such as multiple screens being popped when using the back gesture. Most importantly, I prefer using the NavigationLink(value:...) format, so I hope this issue is addressed soon.