Simplest is, if you can't see the meat before its cooked. Just don't.

Other wagyu stuff that don't make sense is burger and pizza. A wagyu patty isn't going to benefit that much more than normal beef. Likewise with pizza, its going to be burnt in the oven anyway, you lose all the benefit of it being wagyu.
If you eat, you can tell the difference immediately. I find the meltique beef has a weird taste. Fat injection can't even make it taste like a good marbling on normal beef, won't even come close to a wagyu.

Fyi US also got this type wagyu scam . Heck marbling also can be fake ，look at this beef .... Fake marbling . Some honest seller will tell u this is fake one ,99% seller won't tell u the truth .

once the wagyu is minced and make into burger with all the seasoning and sauce, thats no different than eating normal meat. its only the label make u think it is tasty