Interesting circumstances, and a good example of strong data privacy laws.
There are some mainstream feminists that will see this as a miscarriage of justice.
They feel that no matter the circumstances, the man should be financially responsible. Was it his sperm? Responsible. Full stop. Even if it wasn't his sperm, he should be financially obligated if he had sex with the woman around the time she became pregnant. Or simply was in a relationship with her, including a estranged marriage.