Chinese Buddhist cuisine, in particular is very carb heavy, with lots of white rice, steamed bread (mantou), noodles, etc. No cheese, no eggs, no meat. It's practically vegan, but honey is allowed among other things. You do not get impossible burgers. Tofu can be expensive and is not served as often. Other things like peanuts, beans, rice etc are there, but they're often in meagre portions.

No, Chinese Buddhist cuisine varies quite a bit depending on location (Asia or the West) and each individual monastery, center, etc. You're describing what sounds like a pretty bad one with a lack of variety in food and meager portions. Look around, and you should find much better ones.

I've stayed at Chinese Buddhist centers and monasteries in the US. One in particular had a very wide range of vegan and vegetarian foods, and you served stuff yourself, buffet style. Some nuns were vegan, others were vegetarian (eggs and/or dairy). There were plenty of Western as well as Asian/Chinese foods, and very delicious and healthful, with tons of variety. There were plenty of egg and baked goods for nuns who wanted it, and the foods made/available was a large variety, with a lot of superfoods. Lots of different types of nuts and seeds, tofu, cheese, protein, fiber, and vegetables/fruits of all types and colors. Lots of different grain products, too.

The portions were as big as you wanted them to be. Since that monastery observed the "no eating after noon" rule (like a Buddhist version of stricter intermittent fasting), nuns knew to eat a larger amount for breakfast and lunch so they wouldn't be hungry the rest of the day. We got adjusted very quickly to that, though.

You should be careful about spreading misleading information based on your own limited experiences with one Chinese Buddhist monastery in China. My experience with the veg food aspects seemed to have been completely different from yours. When Westerners write about Eastern stuff, they seem to make it seem like they have full knowledge, when they've only observed one small aspect of it. That's how stereotypes spread, and that becomes very debilitating to Asian Americans. We're stigmatized and stereotyped and lowly and backwards, when we can be some of the most deep, nuanced, loving, sophisticated people out there.