I have Ugoos X4Q extra, I have Coreelec properly running from a micro sd card.
I bought a faster USB3.2 flash drive to run Coreelec, but boot hangs on the Amlogic S905X4 logo and not going to the Coreelec launch screen.
Also tried with a USB2 flash drive and that works properly (but slow).
Are USB3.2 flash drives supported in Coreelec?
It’s more likely that the Ugoos X4Q extra bootloader (U-Boot) isn’t recognizing that particular USB drive if it gets stock on the bootloader splash screen. A uart connection would answer that for sure.
You may have better luck with a different brand/model USB3.2 flash drive.