i really don't want to be intrusive in any way, but i have been an autism diagnostician for 13 years. if i can help in any way at all - even just to chat about it - please message me anytime!
i know you probably already know this, on some level, but i think it helps to think about a diagnosis as a tool. i don't mean to imply that it isn't a true part of who someone is - cognitive and social-emotional differences ARE, of course! but the diagnosis itself, on paper- it's something you can pick up and put down. use it when you need it, put it in your family toolbox when you don't. it's a part of your world, but you don't have to always carry it clenched firmly in your hand. a diagnosis also changes absolutely nothing about your sweet 6-year-old that you love so much - it doesn't change a single thing, but it may give you a helpful lens to understand (and help her understand) the way she sees the world.
this book is geared towards pre-teens and up, but i think you may find it really interesting and helpful. some of the strategies, and ways of reframing social interaction to be a little more linear and concrete...they are really ingenious! even if she doesn't get a diagnosis, those confusions about social interactions will still be there (for now) and this may help. <3