Certainly I understand it to be accepted quite nicely when you are talking doctor to doctor, doctor to another health care practitioner, but the legal term that has been developed when you are looking at court decisions, which is what lawyers do, is “mature minor”. It's a question of whether you want to go with a legal term that has a definition associated with it, which has been developed by various courts, with potential flaws in that particular term, or whether it's better to utilize a term that medical professionals better understand when they're performing their day-to-day duties.
On June 6th, 2022. See this statement in context.