• Better spatial reasoning
• Higher hand-eye coordination
• more upper-body musculature
• more overall muscle mass
• stronger bones
• higher grip strength
• avg height advantage
• avg reach advantage
• faster reflexes
• faster strikes
• bigger hands
• stronger fight instinct
• less fat

Honestly it's a marvel that there are a few women who are decent at fighting. The only possible "advantage" that women could ever have physically is a lower center of gravity, but that is massively outweighed by the difference in upper body strength.