@dylanvanassche's merge request to use usb-moded from #sailfishos just landed in postmarketOS edge.
"Devices running GNOME Mobile, Phosh, and Plasma Mobile received a new USB stack based upon usb-moded which is more robust compared to the original stack:
* Netboot works again which regressed with supporting USB tethering.
* Media Transfer Protocol (MTP) is now available for users to access files of their device. See pmaports#646.
* USB access is disabled by default, increasing security. Only after enabling the right mode, SSH/MTP/... functionality will be available as usual. In host mode, nothing is changed.
* Once you connect the device over USB to your computer, a notification will pop up asking which USB mode you want to enable, defaulting to charging only.
* Opens the path to other USB modes through FunctionFS.
When you plug in your device, a notification will be generated allowing you to select the USB mode you prefer"
Thanks @dylanvanassche and everybody who reviewed and tested! 
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Edge blog post:
https://postmarketos.org/edge/2025/12/28/USB-framework-rework/