It's natural to feel a bit overwhelmed and out of your depth at this stage, you want specific answers and there aren't any.
You'll have to wait for the professionals to decide whether to diagnose your child with autism, they will not just base that decision on a single test like GARS2. You've said yourself, that is only part of the referral.
Autism in girls and women presents very differently to autism in boys and men.
No results from any tests can predict the future of any 2 year-old, so please don't expect anyone to give you a list of things she will and will not be able to do.
Every child with autism has a unique set of skills and challenges, no two children with autism are the same, so the more you know exactly what causes [ triggers] your child's behaviour, the better position you are in to help them.
The autistic spectrum isn't a straight line, see these articles
the-art-of-autism.com/understanding-the-spectrum-a-comic-strip-explanation/
neuroclastic.com/2019/05/04/its-a-spectrum-doesnt-mean-what-you-think/
What you and your partner need to do is read as much as you can and watch youtube videos about autism and about any interventions which may support any traits your daughter shows.
Are there any parenting courses for parents of autistic children running in your area - some are online now I understand. The team that are dealing with your daughter's assessment should be able to give you details of those.
If she struggles with transitions, (changing from doing one thing to doing another) try using the now, next and then explanations or visuals, so she always knows what's happening.
This site is full of helpful free resources www.twinkl.co.uk/
This booklet is great for information on Sensory Processing www.falkirk.gov.uk/services/social-care/disabilities/docs/young-people/Making%20Sense%20of%20Sensory%20Behaviour.pdf?
National Autistic Society www.autism.org.uk/
It's not helpful to use terms like "normal" because that leads to thinking that anything outside that definition is somehow "wrong" which in the case of autism is about as unhelpful an attitude as it can get.
Instead, think about differences, people can do things differently, but achieve the same results.
Always ask the team that are doing your DD's assessment if you're not sure about anything, at your next appointment, take a list of questions about your main concerns with you.
Parenting a child with autism needs a different approach to parenting a child who doesn't have it, so again, research that together, the more you and your DH learn together, the better you'll both be able to support your daughter when she needs it.