I'm sure you can, I just don't remember the details of which ones, I'll boot up a my V1 and check tonight. I'm also awaiting a V2 and V3 in the mail so I'll check those when I raise em and make a video on it.
That said, vegan since 2009 here. I remember trying to do the same thing. In the end, remember it's just pixels- and at this point in my life when I say "I want a burger for lunch," I, and the people in my life, know it to mean I really want a veggie burger and we can pick from the plethora of options available these days.
You can buy tubes of bakable vegan friendly croissants IRL or make em vegan at home. boom, your tama now has vegan croissants.
Vegan sushi is available most places, I've even made the spam kind at home with a baked seitan recipe I use. There you go, vegan sushi for your tama.
Cereal? Soy, oat, rice, or almond milk? Yup, vegan friendly tama cereal.
Just egg is a vegan brand of liquid egg, so anything more heavily egg based, tama version wheeeeeee!
Heck, gardien even has "turkey" cutlets and gravy, and cauliflower steaks are a thing too(although that one is a bit harder to consider veg as the two have zero visual similarities
).
I hope this helps! The longer you're vegan this sort of mental switch with tamas will become much easier as you become more comfortable not using the words "vegan," "veggie," or the prefix "veg-" before most veganized foods.
Also, with certain versions(like with the digimon) you can view it like the cat thing. Cats are obligate carnivores. If you work closely with a vet you
can put them on a vegan diet but it might not actually be healthy for the cat. Digimon would literally starve.