Gaussian plot issue

[meghavarshney]

In the process of ref creation
Using morethan 70 male and 50 female
And for that getting

Determined --yfrac cutoff: 0.0027
Reference binsize: 1000000 bp
[INFO - 2026-09-01 18:23:06]: [F] n_bins=2871, mean(dist)=0.9653, std(dist)=0.1499, outliers=1 (0.03%), n_refs<150=0
[INFO - 2026-09-01 18:23:06]:          -> PASS
[WARNING - 2026-09-01 18:23:06]: [M] n_bins=2892, mean(dist)=1.1086, std(dist)=2.2355, outliers=15 (0.52%), n_refs<150=0
[WARNING - 2026-09-01 18:23:06]:        chrY: n_bins=21, mean=22.0469, std=15.5453, outliers=15, n_refs<150=0, usable=21 (100.00%)

Getting this plot

But doesnt it come with two separate peaks for male and female population.
Could you suggest what wrong in this process