New File system on iOS 17 ?

My application works by opening files on the iPad, in iOS 16 when opening a file I could go to "Documents/Inbox"

NSString *pathForFile = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Inbox/myfile.customFile"];
 
if ([fileManager fileExistsAtPath:pathForFile])
{
     // Do something
}

but I installed iOS 17 beta and there is no file in that directory.

Where are the files opened now saved?

How to work with that ?