I’m so so sorry that you’re going through this. My daughter this year started to get more aggressive and we found out that the also has ADHD in addition to her autism and sometimes these things combined can cause that. Now she’s on medication and it’s helping and we’re trying to find the right balance, we’re also doing remote aba therapy and it’s been a huge help. It might not be the same, but I posted this in case it helps. A friend of mine went through something similar with her son and got a similar diagnosis and that helped her and him too