If you need to modify the boot order on an RK3588-based device running BredOS, follow these steps:
ESC key once while the logo is displayed to enter the UEFI menu.
↓ and ↑) to select Boot Maintenance Manager and press Enter.
Boot Options and press Enter.
Change Boot Order and press Enter.
Enter.
↓) to scroll to the bottom of the list.+ key until it reaches the top.
Enter to confirm.Y to save the changes.
Done! Your device will now boot using the new order.