iPhone is still recognized, but USB mount doesn't happen

$ sudo apt update...All packages are up to date.$ sudo apt full-upgrade...0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.$ uname -aLinux ray-desktop 5.13.0-41-generic #46~20.04.1-Ubuntu SMP Wed Apr 20 13:16:21 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

The USB mount of an iPhone-8 (15.6.1) no longer shows up.

When I plug it in, the iPhone buzzes appropriately, and this shows up on the Ubuntu system:

$ sudo journalctl --followAug 27 18:53:05 ray-desktop kernel: usb 1-1: new high-speed USB device number 10 using xhci_hcdAug 27 18:53:05 ray-desktop kernel: usb 1-1: New USB device found, idVendor=05ac, idProduct=12a8, bcdDevice=10.04Aug 27 18:53:05 ray-desktop kernel: usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3Aug 27 18:53:05 ray-desktop kernel: usb 1-1: Product: iPhoneAug 27 18:53:05 ray-desktop kernel: usb 1-1: Manufacturer: Apple Inc.Aug 27 18:53:05 ray-desktop kernel: usb 1-1: SerialNumber: ece9a29270f4b897a925bd7c45ef3dde19b22a95Aug 27 18:53:05 ray-desktop mtp-probe[85766]: checking bus 1, device 10: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-1"Aug 27 18:53:05 ray-desktop mtp-probe[85766]: bus: 1, device: 10 was not an MTP deviceAug 27 18:53:05 ray-desktop mtp-probe[85782]: checking bus 1, device 10: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-1"Aug 27 18:53:05 ray-desktop mtp-probe[85782]: bus: 1, device: 10 was not an MTP device

But there's no obvious mount anywhere (e.g. df, mount, or the Files GUI).

This was working fine a few weeks ago.