The manuscript highlights the differences among the male populations are significant while those among the female populations are within the estimated confidence intervals.
The correct conclusion to reach here (and appears to match what the study says) is that there is a huge gender gap, amongst males there is a statistically significant racial gap, and amongst females the sample size was too small to detect if a similar gap exists.
The female racial gap may not be statistically significant, so you can't say for sure if it is there, but it is possible that it is actually much more significant than the male racial gap. The article says there is "little race variation in arrest rates among females", which is not true. There is more variation than amongst the male population --it just might not be statistically significant.
At best you can say, "despite even bigger variance between races in the female arrest data, the sample of female arrests was too small for it to be conclusive".