10 nmol/L of T is far more than "4 times the average elite female athlete level," though.
10 nmol/L is T is 14.5 times the level of natural T that the average elite female athlete has.
In 2011, the IAAF, WADA and the WADA lab in Lausaunne, Switzerland ran blood tests on the 849 athletes completing in the women's category at the IAAF World Championships in South Korea. They found that the median level of natural T for the world's leading female elite track & field athletes is 0.69 nmol/L. That's the same level as average young women who aren't athletes.
10 nmol/L of T is squarely in the normal male range, which is 7.7-29.4 nmol/L. The normal female range is 0.2-1.68 nmol/L. The vast majority of female people of reproductive age have T under 1.0 nmol/L.
World Athletics and other sports governing bodies like World Aquatics have lowered their T limits for XY DSD athletes in women's competition to below 2.5 nmol/L, and now allow trans-identified male athletes in women's competition only if they can show that since age 12/Tanner Stage 2, whichever came first, their T has always been below 2.5 nmol/L.
Below 2.5 is the new threshold because it turns out that 2.4 nmol/L is the top end of the normal female range when women with elevated natural T due to female health conditions like PCOS and pregnancy are factored in.