P53 tumor suppressor gene detects lung cancer, what if the risk of ovarian cancer is higher?

A simple understanding is that only one proto-oncogene can cause cancer, similar to the expression of dominant genes, the heterozygous state will show consequences, while the tumor suppressor gene needs to be inactivated to cause cancer, similar to the expression of recessive genes, the recessive homozygous state will show consequences.

Therefore, if it is detected that the product of a gene is too active (too much or increased in activity) in the process of carcinogenesis, it may be that the protooncogene is activated into an oncogene, and if it is detected that the product of a gene is too little or inactive, it may be that the tumor suppressor gene (both together) is inactivated.