Being vegan in 2023 is extremely easy, but to me that seems like a relatively new phenomena.
So if I put you in my vicious time machine and sent you until the dim past, how far back would you be vegan?
I think I could make it work for most of the 1900s. But if I was in 1500 I'd give it up.
the main issue i can see would be cooking fat
back in ye olde times, lard was the cheapest, oil was for aristos and rich merchant types
assuming i'm transported back in time and not location of course, as things change availability depending on where you are
you'd think that would be obvious, but people seem to forget that things cost different amounts of money in different places
Bake some potatoes and wait for non-stick pots to be invented.