TIL that the reason Prince Philip didn't become King Philip when he married Queen Elizabeth in 1947 has to do with parliamentary law. In British royalty, the spouse of a king or queen is called a consort. A man who marries the queen is called the prince consort and a woman who marries the king is the queen consort
The short answer: I don’t think it’s ever been officially said why the Queen made Phillip a prince. I can’t find any source saying it’s been verified. It was likely a topic in their marriage. It’s well documented that there were struggled related to her being his Queen, their children not being able to have his last name, Mountbatten (which wasn’t even his original last name. He took it after becoming a British citizen.), and various other power dynamics. We also know that Philip was a bit of a loose canon who likely has specific ideas about masculinity. Imagine being a prince*, giving that up to marry a woman who would become Queen, and then realizing how little power you had in your own life. Now imagine that in 1947.
More information on his actual titles: Philip isn’t officially a prince consort. He was not even a prince until 1957, a full ten years into their marriage. Before becoming a prince, and even still now, he is styled as HRH the Duke of Edinburgh. His role as consort is just consort of the Queen but he hasn’t ever been specifically styled as a prince consort. (Queen Victoria’s husband Prince Albert was however styled as a prince consort.) In 1957, his position as prince became styled as the Prince of the United Kingdom of Great Britain and Northern Island even though as a person his style is HRH, the Duke of Edinburgh. If you needed to include his position as prince, it’s HRH, the Duke of Edinburgh, a prince of the United Kingdom of Great Britain and Northern Island. I don’t think his role as consort to the Queen is used in announcing him, unless perhaps when he is escorting her. Styles are complicated and follow particular traditions that are largely steeped in gender.
Anyway, I hope all of that makes sense.
*To be clear, or less clear depending on how you look at it, Philip was once the Prince of Greece and Denmark which he gave up basically to marry Elizabeth.
As no doubt my fellow K-pop fans will understand, sometimes it's all about that image. More can always be said about the disparity of titles regarding male versus female monarchs, so if anyone would like to weigh in on this topic, please don't let this linkdrop stop you! We always like new posts and fresh perspectives on the matter. While we wait for new stuff, OP, you might like u/mimicofmodes exploring just this topic.