Missing rewarded Legendaries

Before the launch of expansion Festival of Legends, I have earned 500 victories with Druid and Warrior, and got rewarded 4 legendaries for it (2 for each class, all 4 were part of Core set before the expansion). Now that the Core set has changed, I am missing the 2 legendaries that were excluded from Core set - Darius Crowley, and Fandral Staghelm. The other 2 - Cenarius and Grommash Hellscream are still part of Core set, so I am unable to tell if I “own” them, or just have them as everyone because of Core set, and same sh+it will happen if they are ever moved out of Core set.

That is, the golden versions of those Core cards?

Looks for them in the collection in their original set(s), in this case ‘Legacy’ (or you could also check Classic for their corresponding versions there).

the X wins unlocks dont reward cards ( they just show them in gold ) , but are just golden core unlocks , so for example your 500 druid wins just unlocks golden legendary core cards.

So the 500 wins dont give you any card , but if you have 500 druid wins now you can use golden “Kiri, chosen of elune” instead of normal one.

Before was gold “Fandral Staghelm” , now is gold “Kiri, chosen of elune”
Before was gold “Darius Crowley” , now is gold " Armagedillo"