I think they stopped flying the guys over to do Amwf scenes too. They'll stick to the black av actors in Japan and occasionally maybe some American pornstars will come to Japan to shoot like Mia and Abigaile. Even r18 reduced the number of girls coming to the avn earlier this year to be the busty voluptuous ones.
Mia Malkova did fantastic work in her handful of JAV films. Also helps that not only is she a very good performer, but so naturally beautiful.
Hoping more top American stars follow in her footsteps.