This also includes learning Chassidus because it explains and helps internalise the mitzvos of emunas Hashem, yichud Hashem, ahavas and yiras Hashem which women are obligated in just as men.
A woman who learns on her own anything she isn’t obligated in, receives schar for her learning and can also make the Brocha over Torah learning.
Besides this, there were many unique women throughout history who were boki and great scholars in all Torah shbaal peh.
Some examples :
Bruriah
Rachel Rashis daughter who wrote halacha and tshuvos for her father in his old age.
The wife of rabbeinu Tam, miriam, who paskened shaalos uteshuvos.
The chasam sofer learned with his daughter aggados chazal.
I can give you more if wanted.
There were also women who reviewed their husbands works and edited them
The reason for the exceptions was because they learned in their own enough to show they qualified as exceptions to the majority of women whose minds aren’t focused