When should I reach out to someone who had psychosis?

Were were dating for ~4 months and about to make it official. She suddenly had a psychosis. It was her second one. I was part of her psychosis and, unfortunately, had to cut the contact by blocking her everywhere. She probably suffers from schizophrenia as I was told from her best friend to whom I am still in contact. I haven’t seen her for about 7 months and know that she is definitely doing better and started to apologize to some of her former friends which distanced themselves form her. However, she suffers from post psychosis depression and is ashamed. She was back with her ex boyfriend after one week of psychosis, although when she was clear in her mind she told me that he is toxic and she was so glad she met me …

Do you guys think it is a good idea to reach out to her? I am thinking of writing a letter. Or should I wait until she may reach out to me? I would have reached out earlier, but it hurts me that she is back with her ex.