Weaning breastfeed and formula feed baby !

So my daughter is 10 months have nursed and formula feed since she was born. I never was able to get my supply up and she was on a weight watch because of iron deficiency. She just got her 1st teeth and is always biting me what can I do to make her stop biting? Or should I wean her completely off ?

Also I have tried formula feeding all day and night she is fine in the day but not at night. Sometimes I feel so bad cause maybe she isn’t ready. I need advice!!! ASAP!!!

P.S she has never slept through the night.

Side note : I have to other children who I only nursed for 4-6 months. And the just took the formula no problem..