I will look for recipes. I meant to say two more things:

The texture of the rice and amount of liquid is either personal preference or an Italian regional thing, so, no right answer. Secondly, the cheese doesn't necessarily make it creamier, but rather more viscous. The distinctive parmesan flavour does add to it and if you have a suitable vegan substitute, you have it nailed.

BTW these are not expert remarks but rather what I have read and learned. Including ways to eat rice. I am not a fan!🙃