When first starting out, bottle first, then wait at least an hour before solids otherwise baby will be too full to even really try
As I said, cut the solids back if she isn't taking the minimum amount of formula. How often are you offering solids? I would limit it to once a day for the first month or so, then move to twice and day with the goal of three times by 8-9 months at the earliest
For comparison, my DD only took about 1-2 tbsp for the first month with solids only in the morning; she started solids at 5 months. I added lunch in around 6 months and just added a dinner offering at 7 1/2 months. She only takes about 50 mls of solids each time...
You can change to solids first around 10 months.