Interesting to consider why God didn´t bar female homosexuality in light of patriarchy´s polygamous romps, although they should have been precluded too by the singular nature of Genesis 2:24.
Romans 1:26-27
26 For this cause God gave them up unto vile affections: for even their women did change the natural use into that which is against nature:
27 And likewise also the men, leaving the natural use of the woman, burned in their lust one toward another; men with men working that which is unseemly, and receiving in themselves that recompence of their error which was meet.
Historically, lesbianism was not as destructive of the social order as male homosexuality. For the most part, a woman had to have a man supporting her, and needed to keep him sexually satisfied in order for that support to continue. If she had lesbian affairs on the side, it was less destructive of the marriage than if she had hetero affairs on the side.