The World Health Organization suggests:
"As a global public health recommendation, infants should be
exclusively breastfed for the first six months of life to achieve
optimal growth, development and health. Thereafter, to meet their
evolving nutritional requirements, infants should receive
nutritionally adequate and safe complementary foods while breastfeeding continues for up to two years of age or beyond.['Global strategy on infant and young child feeding']
And goes on to say:
Infants are particularly vulnerable during the transition period when
complementary feeding begins. Ensuring that their nutritional needs
are met thus requires that complementary foods be:
timely – meaning
that they are introduced when the need for energy and nutrients
exceeds what can be provided through exclusive and frequent
adequate – meaning that they provide sufficient
energy, protein and micronutrients to meet a growing child’s
safe – meaning that they are hygienically stored
and prepared, and fed with clean hands using clean utensils and not
bottles and teats;
properly fed – meaning that they are given
consistent with a child’s signals of appetite and satiety, and that
meal frequency and feeding method – actively encouraging the child,
even during illness to consume sufficient food using fingers, spoon
or self-feeding – are suitable for age.
Your breastmilk adjusts to the growing nutritional demands of your child but pediatricians recommend solid food introduction by age 1 (if not 6 months) and aren't expect children to be replacing whole meals when they are 6 months - 12 months. I would introduce solids first before the feeding so that she is a little hungry but not starving and demand the breastmilk. She might take the solids better then.
If your child has increased their feeding frequency, the milk might not be adequate anymore so they try to get more to compensate.
Now she must have lots of teeth so I wonder if she will want to chew. Whereas at 6 months, they just learned swallowing without gagging. When my daughter got more teeth, she preferred more texture. I think the period when they are putting everything in their mouth is a natural way to introduce what we actually should put in our mouth like food and that is probably why solids is suggested at 6 months. She is probably ready as well - has a pincer grasp and all that. She just needs a little stronger nudge.