As an engineer i literally use all of it daily.
I use the college stuff maybe once a month, but still in Excel! You cannot escape the Excel!
I recently had to do linear algebra for the first time ever irl. I’ve been out of school for ~15 years. I was trying to make a rotation matrix to transform some points in 2D space. It took me a very long time to remember how it’s performed yet alone “transformation matrix” which is something I’d never heard of before. I got my code all working and was so proud, then later found that one of the r packages I was using could have just solved it all automatically :/
As an engineer I don’t get to use any of it very often. I’m always excited when I get to do any actual engineering instead of project management.
You can always try to pivot from project management to actual engineering. I am load engineer for wind turbines and everything is time dependant and dynamic. For past 10years i use every bit of math I learned is school and uni.