Sarc I am so sorry to read you are going through this.

On the positive side I am glad you are receiving guidance from a therapist and also that your ex is not causing trouble between you and your daughter.

I have seen a young child in my family go through what you are describing, it is heart breaking. In my humble opinion you are doing the right thing giving that space. From what I have observed consistency once things have settled a bit will help.

If everyone was okay with it then Bp's suggestion of writing might be a good idea. Just to keep that connection there.

Keep hope, your daughter is so young, so much will change over the coming years, keep faith that you can build and develop your relationship with her.