Yes, it is compatible.

You can, but a stone slab is better. https://www.pizzeriagrill.ch/pizza-backen-auf-dem-grill/

Hi Grillmaster! I have just measured the M plate. With handle etc. it easily measures 41 cm! That's probably why it won't fit on your grill. Take the smaller one or buy a bigger grill :-). Have a nice day!