When my baby was super new he fed A lot! It is normal and good in my opinion bc you're still building your supply.

It's a lot of work for your baby to extract the breast milk and takes a lot more time than a bottle does

3 weeks is the first big growth spurt. She's cluster feeding which is normal and necessary to boost your supply. Don't supplement or you'll risk lowering your supply. Don't fall into that trap. She's Doing exactly what she's supposed to be doing.

My kids did the same. It is very normal.

Sounds like baby is cluster feeding. They do that when they go through a growth spurt. It also helps build up your milk supply.