Elevation Burger NOT VEGAN FRIENDLY

I was initially excited to see "Vegan" On The menu at Elevation Burger and how they say they care about ingredients. This is BS marketing. In particular Elevation Burger in Falls Church VA. It is impossible to get a straight answer from them for what is vegan. Even emailing their website. Just to clarify, their caramelized onions are not vegan since they cook them with the meat. (they say they cook the vegan patties on a non meat grill, but I doubt it) Their mushrooms are not vegan. All stuff I find out months later after asking 100 times. What else is not Vegan? Who knows. Hope they listen.