We used to have that too in Denmark until summer time in the 2010's I think. Authorities could grant a so-called king's letter to minors aged 15-17, allowing them to get married. I think it was mostly used in the case of teen pregnancies. I don't think it was done very often towards the end though.

It was eventually abolished for racist reasons. A Liberal Party minister of integration decided to forcibly separate all refugee families where one of the spouses was ages 15-17, hinting at the Muslim brainpan predisposing Muslim men for being nonces. However, the decision was illegal, not for being racist and causing harm to people but for violating principles of administrative law.

In the ensuing scandal the chuds claimed that the minister shouldn't get in trouble because she had saved little girls from being victimised by 50 year old dark-skinned men with huge scary beards. This led people to point out that the feigned concerns were bullshit since minors could still legally get married in Denmark. The institution of the king's letters, mostly forgotten by most people at the time, became an embarrassment and was quietly abolished.

If you want social progress to happen in this country, your best shot is to make a racist argument for it.