I would be making a few play dates with the kinder aged ones and invited them to stay as well. This way she will be able to get to know you and your child but also see how you deal with ASD. She might have questions in her mind but is to scared to voice them.
If you know of a good playgroup that would help next time she says something tell her about it and let her know how much it helped you.
All the best as you decide your next step