Not mimicking me

Amber

I just realized our baby doesnt copy us. She'll return a smile and she makes eye contact, she responds to sound, etc. I just remember my first would copy the face i make way younger than my daughter is now. She will watch me make faces and seem interested, but never mimics anything i do except smiling. Anyone else's LO similar? Ill talk to my ped at her 6 month in a couple of weeks. Just looking for any similar situations.