Almost 30 years into my career as a software engineer, I'm now making a computer game that takes place in Space and were planets and comets follow Orbital Mechanics, so I'm using stuff I learned at Uni all those years ago in Degree-level Physics, since I went to university to study Physics (though later changed to an EE degree and ended up going to work as a software developer after graduating because that's what I really liked to do).

I've also had opportunity to use stuff I learned in the EE degree for software engineering, the most interesting of which was using my knowledge of microprocessor design during the time I was designing high performance distributed systems for Investment Banks.

(I've also used that EE knowledge in making Embedded Systems - because I can do both the hardware and the software sides - though that was just for fun)

Also, pretty much through my career, I would often end up using University-level Mathematics, for example in banking it tended to be stuff like statistics, derivatives and integrals (including numerical approach methods) whilst game-making is heavy on trigonometry, vectors and matrices.

So even though I never formally learned Software Engineering at University, the stuff from the actual STEM degrees I attended (the one were I started - Physics - and the one I ended up graduating in - Electronics Engineering) were actually useful in it, sometimes in surprising ways.

At the very least just the Maths will be the difference between being pretty mediocre or actually knowing what you're doing in more advanced domains that are heavy users of Technology: I would've been pretty lost at making software systems for the business of Equity Derivatives Trading if I didn't know Statistics, Derivatives, Integrals and Numerical Approach Methods and ditto when making GPU shaders for 3D games if I didn't know Trigonometry, Vectors and Matrices.

And this is without going into just understanding stuff I hear about but are currently not using, such as Neural Networks which are used in things like ChatGPT, and Statistics are invaluable in punching through most of the "common sense" bullshit spouted by politicians and other people played to deceive the general public.

Absolutely, you can be a coder, even a good one, without degree level education, but for the more advanced stuff you'll need at least the degree level Maths even if a lot of the rest of your degree will likely be far less useful or useless.