Xhci omnia u-boot

is it possible for omnia turris OS 5.3.8
to boot from usb? i mean if iit will be possible to merge u-boot patch for xhci… from upstream to be u-boot able to recognize and boot from pluged in usb btrfs. old post here: U-boot usb3.0 xhci support for omnia

Try new U-Boot.

why this change is not included in Turris OS version 3 → 5 change?

Because Turris team postpone this functionality to the further.