1st time applied PR?

I think appeal doesn't work. You can only reapply. Suggest to reapply with better profile, else you would expect another reject within 6 months. E.g., with a family, higher salary, etc.

An example is my boss. She applied with her family, and they are classified in the others group, which is the lowest tier. Because of her niche, her husband and kid. They were given PR within a short period.