I dreamed twice that my father died.

It's actually a good thing. This means that your father is healthy and will live longer.

According to the traditional dream interpretation method in China, dreaming of the death of a healthy relative means that the relative will live longer. If a relative is seriously ill or you are very worried about losing someone, dreaming of this person's death may indicate a kind of worry and anxiety, but I don't think it is excluded that some people with very keen sixth sense may also have premonitory dreams.