I have a Librem Purism 13 inch with Pureboot.
When I boot (for example Tails OS) via USB I am presented with a list of boot options provided by PureOS. In the example of Tails there are 4 options, two of which are troubleshooting mode.
When I select one of the options I boot directly into the OS.
How can I see the actual Tails boot menu with PureOS? For example, if I plug the usb into a computer with a standard BIOS or UEFI, once booting from USB I see the Tails bootloader. These bootloaders have options that I sometimes need to bypass.
In this example I need to access the tails boot loader to access the advanced options and change a boot parameter.