My 12mo is not eating enough! Need help

So she just turned 1 and i stopped formula and switched her to toddlers milk and whole milk. She will have about 4 bottles of like 9oz every day. She is not eating enough at all. No matter what I make she will just eat fruits and yogurt. I try to add chia seeds and nutritional things to her yogurt.

She is for sure not getting all the nutrients she needs.

Any advice? Her doctors appointment is in a couple of weeks so I will definitely bring that up.