I am sure they do but I don't know what they are, or rather I've not used them specifically with dd.
This one is old but looks good...
www.amazon.co.uk/Paper-Bag-Princess-Munsch-Kids/dp/0920236162
I tell my daughter and son that girls and boys are of equal value.
However, girls are not generally as strong as boys, or as fast, which is why boys should not fight girls and why sports are segregated by sex.
If your dd is receiving any kind of bad treatment at the hands of boys in the class it is not just up to her to assert herself, the teacher should be keeping an eye on any inappropriate behaviour, e.g. boys pushing in or being unpleasant to each other or to the girls.
Issues with friendships can happen to boys and to girls, they can all behave badly, I am not sure that girls are any 'worse' than boys at anything.
I do like to read on line, especially articles etc....
Facebook groups which present ideas for girls and boys are:
Girls
A Mighty Girl on Facebook
Princess Free Zone on Facebook
Women you should know on Facebook
melindatankardreist.com/tag/toward-the-stars/
Boys
achilles effect on Facebook