How to make an external bootable drive in macOS Tahoe

You can still make an external macOS bootable drive, but Apple's tighter security procedures mean you have to prepare for it ...
Ars Technica

Making a SSD bootable

My old pc had a SSD which I would like to be the boot drive in a new machine. However, the new machine cannot boot with it. Here is what the new machine has. So I assume drive 2 is the new SSD? Drive ...