Yes, we should feed baby as per demand.. And the reflux she is having is totally normal for her age and doesnot require any urgent medical attention.. Although if she regurgitate a lot more or if it is associated with proper vomiting with blood/mucous/bile.. U need to consult us..
As per your history, weight gain is quite good.. So as for now feed as per demand and watch for signs as explained above..
Next Steps
Try to use formula as less as u can
Encourage breastfeeds over formula
Keep burping after each feeds atleast for 15-20min
Health Tips
If baby is not gaining weight or is asscoiated with vomiting of blood/mucous/bile..Consult urgently
Regards