Probably the biggest reason you don't see many Asian women in catfight videos against white girls is -- there aren't that many Asian women in America. In big cities and some small ones it may seem like there's lots of Asians, but in total numbers there aren't that many. If Asians, per capita, got into catfighting at the same rate as white women, you might expect the kind of numbers you actually see in American productions. It's even possible that Asians are overrepresented according to their share of the population.
We might ask ourselves why we don't see more black and Hispanic women in catfight videos, since they vastly outnumber Asians in America. I Wikied US Population stats, and America has 228 million White people, 47 million Hispanic, 37.6 million Blacks, and 13.4 million Asians.
It's entirely possible that Hispanics and Blacks, culturally, just don't see a lot of catfight videos and thus have no idea of this employment opportunity.
The Philippines has long been the best source for real fights with hot Asian babes. Way back in the Mesozoic era, I used to implore Mike, of Asian Connection, to take a blond American over there and get her in some matches. I even offered to put up money, as did others, but it never happened. Instead, he matched the famous Swedish Tina against his wife, Cristy in the USA, and that was a fun match, though not really fair, given Tina's experience. Tina won the bout, but Cristy put up a good scrap. Tina might have lost in Manila against the likes of Lonnie or Janeth.
FWIW, years ago I did a survey of real matches pitting White against Asian. At first, white girls had a big lead, but when I was finished, it ended up 50-50. In my town there's a lot of tough-looking -- and very hot -- Hmong girls who would be no easy pickings for any white girl.
In the end, it all comes down to the individuals. I just happen to love the way blonds and Asians look in combat.