How can I open the Boot Device Menu on an XMG laptop?

Today my laptop has arrived, it has no operating system, so I have the Windows installation on my USB stick. The laptop has a UEFI boot menu with Ctrl + Alt + Del, but there's no menu that I can choose to start my laptop with my USB stick. That's why I wanted to ask you how that works, I've seen on the internet that it is pressing F11 start but that did not work for me.

Then try the F-keys until it works,

The most likely is the F8.

Try F2 with "continuous fire".

With F2 the UEFI menu opens

F8 does not work

There you should also find your boat settings. Or is there no boot disk?

Then try the F-keys until it works

F2 - BIOS, F7 - Boot Menu

You need to press down F2 or F8 continuously - hammering on it does not work