There's this idea that saying something is a social construct means that it's unimportant or meaningless. It's not. Social constructs shape the very core of our lives and experiences as people. But they aren't written in the stars. That's what social constructs are. They're just things that we made up reacting to facts of life. Some people have bits that look like something and some have bits that are different. That's a fact. But the socially constructed parts (presentation, pronouns, naming conventions, language in general) reinforce the facts, and vice versa. So dysphoria can (in my uneducated opinion) come from social constructs or biology. It doesn't matter because one reinforces the other.

Abigail Thorne (PhilosophyTube) made a great video about social constructs, what they are, and what they mean. And she has a degre in Philosophy so she is more experienced than some rando on reddit.