I guess some babies just aren't ready for solids around 6 months, when we all follow general advice and start to introduce them. It doesn't mean that your baby won't ever eat. She just isn't up for it yet.
We introduced solids at 5.5 months. Our baby happily accepted, but to be honest, I think we started too early. For example, she only started properly chewing about a month ago! She's 16 months today.
I returned to this article over and over again when my LO was 12 months and seemed to eat tiny, tiny solid meals and nurse all the time, for nutrition as well as for hydration. I was especially worried about how little fluid she seemed to take in from any source other than the breast.
https://kellymom.com/nutrition/starting-solids/toddler-foods/
It focuses mostly on babies over 12 months but is very reassuring in that it highlights how and why a diet predominantly composed of breastmilk, even at this age, is absolutely fine.
Since our LO hit 14 months, we've seen a sudden massive shift from the breast to food/water. She nurses at most just four times in 24 hours - often less - and is an absolute pig with a plate of food. I'll be surprised if she continues nursing up to 24 months ... but I'm hoping she will.
Don't worry and keep offering tastes of food. Your baby won't exclusively nurse forever.