I might be going against the grain here but I think it's worth raising concerns with health visitor or GP.
Firstly, if your daughter is autistic then that's just who she is, so the idea that we should all be searching for reasons why she isn't feels misplaced. If she is, you will both be okay and happy and love each other just as much! There will be an adjustment and acceptance period, and there are many battles (mainly to get support), but it will be okay. She might not be, but if she is, the sooner you get on the path to diagnosis the better, since it takes absolutely bloody ages, and then when it comes to schooling, the EHCP journey is also painfully slow. So asking the questions now can only be a useful thing, even if everyone says she's neurotypical!
12 months is definitely on the early side of things for any formal assessment or diagnosis, but I knew when my son was that age, and he was my first child. I just had a gut feeling, and every behaviour pointed towards that being the answer. Everyone around us was saying "oh it's normal! So many boys don't speak/wave/clap until they're 3!" or "my cousin didn't talk til he was 5 and he's a genius" yada yada. It actually wasn't helpful. It made me feel like my concerns weren't valid, and that we weren't parenting properly (eg speak to him more! Present different foods!). As soon as people validated what I was saying, things improved.
My daughter was born in lockdown, and is now 18mos and she has been ENTIRELY different from as young as 6 months, despite not seeing anyone for most of the first year of her life. She always shared toys, wanted my attention, gave eye contact, waved, ate well, etc. She was slower to walk but in every other respect they were chalk and cheese and so I realised just how clear it had been with my DS from early on (I just had no comparison).
Your DD might not be autistic, but if you're having these worries, there is no harm in investigating further. And your concerns are valid, so don't feel bad for raising them!