My daughter is 2.5, ASD diagnosis, still non-verbal (at least no functional language). The major issues we have are:
No understanding of the "wait" concept, if she wants something it better happen now.
Tantrums when we take something away, there is just no reasoning with her when she really wants something.
She will not sit during circle time.
Any suggestions, or experience stories are highly appreciated.
Have you tried using the first / then ? So when she wants something you can say first you need to ... then you'll get to ....
I may not explain it right but hopefully it makes some sense. Also try a visual schedule.
My son also had this problem until he was almost 7!!
However, the school used a special chair for him. It's called a Cube Chair. It really did the trick and helped him quite a bit!! He no longer needs it during carpet/circle activities. At first they paired it with a weighted lap blanket or weighted vest. Then moved on to the chair alone. He no longer needs the chair but he is given plenty of sensory breaks throughout the school day.
I understand what you are saying, it is just difficult to observe other kids her age (almost everyone), being able to sit through entire activity circle time, and her just wondering around the room.
2.5 is too young for circle time. Your daughter will let you know when she is ready. I followed my child's lead on almost everything and she is potty trained. Knows her abc's and numbers and listens to instructions. It takes a lot for kids to process what you want them to do. A lot of repetition and patience is needed. I had to understand that she needs a lot of pointing and time to grasp the meaning of the words that I am saying. She isn't disobedient, just can't understand. Break everything into small pieces.