I took pre-algebra in grade school, algebra and intermediate algebra in high school (and intermediate algebra eventually gets very complicated, BTW). And in college I took calculus. Which I found easy to understand, in its basic form. Like algebra was for me. But my cousin's daughter took calculus in grade school. Who does that? Is that the rule today or the exception?
It all depends on what type of Diploma they choose to get to have the opportunity to take those classes.. She probably went for the college prep Diploma.. I went for it and I graduated with 2.5 Science Credits towards college.
I hated calculus. That's when I gave up on math, senior year. Then like 20 years later I realized coding is basically calculus at some level (functions). So I sorta used it without realizing it.
Of all the math classes that I had in high school (and we weren't allowed to skip any of them), I found algebra to be the most relevant and useful. It's helped me with calculating medication doses, drip speeds for IVs, ratios and proportions and much much more.