I would drop it cold turkey

I bet she is refusing the bottles in waiting for the solids. My DD did the exact same thing and I cut her solids for a couple of days. She quickly learned that solids were secondary and started finishing bottles again

At 7 months, she doesn't need the CN. She should be able to easily do a 2.5 hr A time, or even 2.75 hrs. That would let you spread her meals out a bit. And I have actually found that DD prefers to have her solids an hour after a bottle in the morning, but then her lunch and dinner right after her bottle

Her routine is like this:
Wake 6am, bottle 6-8 ozs
Solids at 7am (2 tbsp fruit mixed with 1 1/2 tbsp cereal)
Nap 930-1045/11
Bottle at 1145 - 6 oz, solids at noon - 3 tbsp veggies, 2 tbsp fruit and sometimes 1 tbsp cereal if still hungry
Nap 215-330
Bottle at 4pm, solids at 415: 1-2 tbsp veggies.
BT bottle at 715. Bed at 730.