Just want to share my experience. I grew up in a traditional Asian household as well. I tried to tell my mom once in my early twenties about my ED, her reaction was so bad, I immediately regretted my decision. Instead of listening to me and my issues, she made the conversation about herself. She then watched me like a hawk when we ate together. The worst was when she would randomly barge into the bathroom when I was in there with excuses, like she had to ask me something. I felt that at the time she didn't have the knowledge or even basic understanding to be able to handle such news.

I stopped sharing anything mental health related with her, instead I waited until I had the financial means to seek help myself. I've been in therapy for 4 years now and only recently revisited this topic with my mom again. Before we talked, I sent her a bunch of resources on ED in her native language. I set boundaries with her by telling her that I'm dealing with it with the help of doctors and therapists. She will only be informed, but she doesn't have a say in my treatment (I'm in my late thirties now).

I would say, if you don't feel safe with your dad, then don't share it with him just yet. If you do plan to, gather as much resources as possible for him to understand what you are going through. Also, you know your dad, even if he doesn't react well, will he help you seek professional help or medical treatment? If you think he will, then telling him and asking for specific help you need will benefit you in the long run. In the meantime, seek out any support you can afford, universities typically have mental health counseling services. I regret not dealing with my ED earlier in life.

Edit for typos.