You're talking about Asada's 3F<-2Lo-2Lo in LP at Vancouver, right?
Yup.
I don't think she had a 3F-3Lo in 2010. She tried the layout you mentioned in 2014, and while it didn't work at the Olympics, she won Worlds that year with 3A, 3F-3Lo, 3Lz and set a world record with it iirc.
3A, 3F, 3lo-2lo
Yeah which to me was an example of bad rules (still a thing in juniors sadly), cause 3A is a much harder element than a 3Ltz and as happened other times before and after, judges should have rewarded Mao for attempting an element no one else had.
With the 3A allowed as solo element, she could have gone for the 3flip-3lo but again maybe judges would have called the underrotation as they did with Miki Ando's lutz-loop, considering somehow Mao got negative GOE on the solo 3F which was cleanly landed.
That's why i think she wouldn't have won even with the 2008 gpf sp and 2007 gpf fs layouts. Tech panels usually had eyes for her and when they hadn't, judges had, since they were finding ways to give her negative GOEs for clean jumps.
The GOEs gap with Kim was generally too big.