34 and 35 are on the unpopulated microSD pads (light blue section - they are silk-screened with the light blue names).
MISO1 is not brought out AFAICT - not every pin can be brought out on the T4.0
MISO1 is actually brought out on the Teensy 4.0. Just below the card on this page, it states "Not shown on this reference card, Pin 0: CS1, Pin 1: MISO1"