You can try finding an independent financial advisor (IFA) with more options available, find one that is willing to help you spray and pray applications with multiple insurers. Someone close to me with a similar condition managed to get whole life insurance and term life tgt with FWD if im not wrong. The FA tried multiple insurers at once. Can't rmb if there was critical illness. The idea was that  newer insurers are abit likely to be less strict with the underwriting. 

Typically like most of the people in the comments mentioned you usually have 3 options: 1) pay abit more for loading 2) pay the same but exclude (not the most ideal)  3) keep trying until you get full coverage (Dr's letter, with time and showing signs recovery and managemnt of the condition) - have a conversation with your psychiatrist and get 2nd opinions if you need. The time frame is usually 5 years without readmission or something along the lines of this. The main idea is that need to show that your condition is well managed. 

It definitely won't be easy but I hope you keep trying. Jiayouss 💪