There are no “legal” rules defining how Wagyu f1s are marketed which causes the problem of poor representation. There are plenty High Quality FB Wagyu raised here in the US.
I suggest buying 3-4 Wagyu steaks from different providers who sell F1 Wagyu then purchasing 3-4 100% steaks from proven wagyu breeders with good reputations and then figure out if your product deserves the "Wagyu" designation which insinuates 100% Wagyu. Nothing gets my BP up more than...