Honestly, there is no hard and fast rules....well people say 'this is what you do' but in the two years between my first and second the recommendations by the health nurse changed loads.
One thing I do know is my second loved his solids far more than my first, but as he's got older he's way more limited in what he eats (same with some cousins... Better baby eater, worse later yet one good all along and one bad all along) ..so what you do now really isn't going to make for any patterns
Most important is milk until 12mo and food is to play and learn... BLW can be now or later it's totally how the are when sitting on your lap when you eat, if they reach for your food then it kind of says they are wanting to do it that way and nothing to do with size or age (by 6mo some premmies can be 95% because of genetics... Aka my Godson, born at 34weeks and 1.5kg (3.25lb), at 7 months was actually bigger than my baby born at 4kg... So IMHO size and weight aren't the factors, more can she sit up, and does she want to eat, if shes interested and she's having solids after milk feeds and it's not messing with milk feeds or giving an upset tummy, then 3 solid feeds a day or 1 feed a day is no different.
I love this little saying ' on the day your child starts school the teacher won't be able to tell (or care) how she was fed as a baby...it won't make her a better child so it's not something you can make a mistake on... rather part of the journey'
Actually at 6mo the best thing about food is not what goes in their mouth, but what the learn about how it feels in the hands in the mouth and what they see about others eating around them... The modelling of family is 100% most important, not the amount or times.