Hi Rxkxd, welcome!
I'm not the OP and my kids don't have autism. However, we mix with a big range of other home ed families, many of whom have special needs. Several years ago, a survey conducted by the biggest home ed charity in England found that unmet special needs was the top reason for parents to remove kids from school. So you aren't alone.
My younger child has a learning disability, was delayed across the board, and was also physically disabled until she was about eight. I was already home educating her older sibling out of choice, and when I saw that dd2 wasn't a typically developing child there was no question in my mind that I didn't want to subject her to the school system which was not designed for her. Even with great teachers and the best will in the world, there is no way the concept of differentiation can be right for a 6yo whose developmental need is to change dolly nappies rather than do a maths lesson. If you give her a TA, put her in the corner and let her do her own thing, what's the point of being in the classroom? She has been happier with family and friends.
She's 14 now. Her childhood has been all about what she wants and needs, not about making her fit. You can sometimes hammer a square peg into a round hole, but not without damaging the peg. She has developed in her own time, without feeling that anything was "wrong" with her. I have a confident, happy kid, which is the most important thing to me. This year she learned to read, having been assured by me that she WOULD manage it one day when she was ready and interested, that she might or might not need some extra help, that people learn this skill at different ages and there are all sorts of ways to do it. She was motivated by a desire to exchange messages with her friends during lockdown, and she used the speech-to-text feature of her tablet. The other day she read me a four-paragraph email from her uncle, almost without a pause.
There has been no hurry about reading, because she could learn in other ways until that skill developed: through conversation, experimentation, observation, watching documentaries, playing. She hasn't been "behind"; she has just been learning other things than how to write "Tuesday".
In home ed circles, it is often said that learning is a journey, not a race. Schools can't allow the time for that journey. Can you imagine a school NOT pressurising a child to learn to read, and just waiting until she was ready? They don't even leave five year olds who don't want to read!
My daughter still seems quite young and it feels surreal to think that many of her age peers are in the throes of GCSEs. She is starting to think about her future and says that she might like to be a bicycle mechanic or a mum, both ambitions which suit her skills and interests. We haven't needed an EHCP, but I plan to apply for one in case it helps with college. I somewhat doubt she will be focused enough for college at 16, but she can go later. There's no rush.