100% agreed! There's often a lot of hidden gems in the accessibility settings of apps and websites; that's often where to find settings related to disabling autoplay for videos, reducing or disabling animations of "reactions" to things, etc. On Android phones, you can swap to the "old" three-button controls for home, back, and switching apps instead of having to use the special swipe shortcuts that don't have visual aids. My phone also has a number of useful settings for shortcuts (e.g. launching an app of my choosing when I double tap my power button).

A bit tangential, but I highly recommend glancing through all of the settings whenever you set up a new device, install a new app, make an account on a new site, etc. Nothing beats the discoverability of just having a list of literally everything you can do; even if you don't find anything worth changing the defaults for, you might find settings related to a feature you didn't even know existed.