I haven't done it yet because I haven't registered a developer account, so I don't have a certificate to conduct real device testing. I still appreciate your response.

Thanks again for your help. I commented out this piece of code, and there's some good news and two bad news. Good news: The error is gone. Bad news: I still can't input anything, and my search functionality isn't working either. It's so strange—I searched the entire project, and this file is the only place where navigationDestination is used. I haven't found the cause yet. I'm not sure if I can upload the source code to GitHub to share it with you so you can take a look when you have time.

Thank you for your help. I tried pressing Command + K in the simulator, but nothing changed; I still can't input any content. I've also commented out the overlay-related code, but I still can't type anything, although I can use the paste function.