I have no personal experience of that but i’ve read there will be another blacksmith in expansion, from him you will be able to gamble high level legendaries but he won’t accept vanilla rare materials so you will have to farm new ones
But it does NOT include the new legendaries till level 75. And thats
a good thing.
My tiny little biddy hope is still… level 82 items are also possible.
Maybe the devs overlooked something here…