Parental means to do with a mother or a father. The role, rather than the person.
It attaches to rights, leave, consent and control, and each of those is a formal category, so parental consent is legally required for a great many things involving children. Parental leave is the shared version of maternity and paternity leave. Parental controls are the settings that limit what a child can see on a device. The word covers both parents at once, which is exactly why officialdom prefers it.
1adjectiveparentalRelating to a parent or parents.
“The trip requires parental consent.”
Latin
parentālis
Middle French
parental
English, today
parental
Built from
From Middle French parental, from Latin parentālis, from parens (“parent”).
Etymology from Wiktionary, CC BY-SA