Run these and post results:
dmesg | paste
udevadm info /sys/bus/sdio/devices/sdio* | paste
lsusb -vvv | paste
Thanks kszaq. Actually lsmod reports that the bluetooth module is loaded. SSHed to the wrong box before, but LibreELEC is reporting that no bluetooth adapter is found. Here are the lsmod results if interested:
And the other results as requested: