https://askubuntu.com/questions/726938/how-to-boot-from-a-us...
https://www.ubackup.com/articles/lenovo-boot-from-usb-window...
This may seem frustrating from a hackers perspective, but it is what it is.
Not saying Apple has to do it the way it's doing everything to also innovate things like M1, but whatever happened to capitalistic society?
Meanwhile, my no-name Chinese mobo exclaims "Press F10 for BOOT MENU!!" (the uppercase and exclamation marks are verbatim) on its BIOS post screen, and nearly all the other PCs I've used have similar if less exciting messages. But with Apple, all you get is an Apple logo, and if you need to do anything other than normal boot, you had better have looked it up because it won't tell you.
1: https://en.wikipedia.org/wiki/Apple%E2%80%93Intel_architectu...
2: https://en.wikipedia.org/wiki/Unified_Extensible_Firmware_In...
3: Well, they added BIOS compatibility later, to allow booting OSes like Windows, but what's missing is some fancy GUI around it - see https://en.wikipedia.org/wiki/Apple%E2%80%93Intel_architectu...