According to VegNews and PETA, the French toast sticks at Burger King are vegan! They
tasted alright, but it's nice to find a vegan hot breakfast food option at a fast food restaurant.
https://vegnews.com/2019/6/10-vegan-hacks-for-your-favorite-fast-food-joints
The Burger King I went to is actually in Terminal 3 in SFO, although it didn't show up in the app.