Parmesan is easy to substitute for nutritional yeast. It’s the mozzarella substitutes that are trickier to make realistic/tasty.

True, I've had some pesto like substance on vegan pizzas served by very vegan friends, so I guess they have a good substitute for it.

There are many ways to make pesto, and to make it plant based as well. My current favourite when preparing it myself is to grind smoked roasted almonds and nutritional yeast flakes.

It's not even funny how Italian and Indian food are so trivially made vegan!

Most Indian food is not vegan. We use a lot of dairy products in our cooking. The vegetarian stuff is still awesome though.

well, I'm from India too, so :)

Also, I said it's trivial to make Indian food vegan, not that Indian food is vegan by default. What specific ingredients are irreplaceable in Indian cooking? I've replaced paneer with tofu, kheer (and consequently, most milk-based drinks) is trivially made with oat milk, vegan yoghurt can replace curd in 99% of the dishes (like chaat, raita, etc), vegan butter is indistinguishable from dairy-based butter. Ghee doesn't have a substitute, but it isn't a big deal. Naan has curd in it traditionally, but it's pretty easy to make it without dairy. Since going vegan, I've made virtually all of my favourite Indian dishes and it was no more difficult than the traditional recipes.

South Indian food (where I'm from) is even easier as most dishes don't have dairy to begin with.

Some milk-based sweets are the only things that I miss out on, but that's probably a good thing anyway.