Yeah, I think it’s generally put on at the end. If you click through to the Strawberry Cones website, you can see the mayonnaise as the sort of checkerboard pattern on various pizzas.
Once upon a time, when I lived in Japan, I went to my local Italian place for lunch, and their yoshoku (i.e. Western food) special was “mentaiko & mayonnaise pizza.” Mentaiko, if you’re not familiar, is those tiny fluorescent orange fish eggs. In that case, I did not really strive to find out whether the mayo was cooked or whether it was merely drizzled on at the end. Either way sounded pretty revolting to me, so I had the pasta buffet (¥1000, as I recall!) instead.
