My EE education didn’t cover decoupling caps, and from talking to others from different schools they didn’t learn it either. It's something that only comes out in DIY projects, and unfortunately most schools don't care about projects or fostering independent/continuous learning.
Are you an analog EE? If so that’s surprising. Did you have any microelectronics classes where you essentially build up your own opamp, one stage at a time? Bypassing is usually covered in this class, or in its lab, especially when discussing PSRR of the system.
Digital systems classes can cover it too, when going over power distribution, but that’s usually a graduate level class.
The digital VLSI or signal processing tracks of EE might not require this stuff anymore.
