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Though it is not a course,I would recommend the book, "Computing Systems:A Programmers Perspective" by Randall Bryant and David O' Hallaron. I especially like its full focus on x86-64, explaining the behaviour of a modern processor, including extensive coverage of floating point functionality, which most introductory books only cover perfunctorily.

A rare computer arch book written with programmers as the intended audience.

This will change your life.

https://ocw.mit.edu/courses/electrical-engineering-and-compu...

Maybe elements of computing systems?

I’m struggling to search for this, is it by a particular university or provider?

https://www.nand2tetris.org/

Thank you

The class doesn't exist because the adequately architected software barely exists.

Isn't that the truth. Sometimes I feel like the only sane person in an insane world when no one seems to admit that no one really understands how to architect software.