During vaccination visit, if baby weight is less than intended weight, does pediatrician suggest formula powder to start ?

It will depend on how much less the weight is. If it is just a small difference then the doctor will ask you to work on your breast feeding and try and feed for longer duration each feed. If it is very different yes the suggestion for formula will be made.

My daughter was and is under weight! never has her pead recommended !

he is not underweight. his weight growth is good as per my pediatrician. he scolded me for asking him to suggest formula for my baby