I added media keys! So far I have pause/play, next, previous, and volume. It turns out those types of keys are not regular keyboard keys. They actually are part of something called Consumer Control. The library that works with Consumer Control is very similar to the built-in esp-idf keyboard library but as I looked at the code, I noticed something wrong with it. I found out that the USBHIDKeyboard library was vendored and then modified. To make sure that Consumer Control did not mess with the keyboard I refactored the code so it just used the built in library. Here is a demo of the volume keys: