Since I had trouble booting a Debian 13 ISO on my 2019 MacBook Pro laptop while trying out t2linux on it, I decided to try imaging a USB drive with the same ISO.
I was able to boot into the installer by selecting the second of three "EFI Boot" options that appeared next to the regular boot option.
Trying the first one for the USB drive would cause the MacBook to into Recovery mode, say that it needed a software update to proceed to boot, but does the same thing over and over again.
Using a USB hub with wired Ethernet and an external keyboard/trackpad, I was able to get through the install and rebooted the laptop. I logged into GNOME, installed the firmware package, then installed the t2linux packages. On reboot, Debian would boot up but then hang with a black screen trying to bring up the graphical interface.