S.H.
Per our Pediatrician:
For the 1st year of life, breastfeed/Formula on demand. 24/7. Day and night.
Solids, is not as nutritionally dense, as breastmilk or Formula.
Solids, for the 1st year, is not a replacement for nursing.
For the 1st year, solids is only an introduction to "eating." Not the baby's main meal, nor do they need to eat or have to eat, 3 meals a day, like an adult.
For the 1st year, solids is not a baby's main source of nutrition.
Also, before giving solids, always nurse, first. If you nurse after, baby will be too full...to nurse. And/or, this can affect your breastmilk production.
My kids, even if started solids at 6 months old, they only ate like a teaspoon. And only once a day. I still predominantly, nursed. 24/7. On demand. Be aware of "serving size" of solids. Their tummies are tiny.