Good morning. I've been working on a new PCB design based on the ESP32-LyraT-Mini. Its schematic ( https://dl.espressif.com/dl/schematics/SCH_ESP32-LYRAT-MINI_V1.2_20190605.pdf ) has a bunch of components that are light grey, some of which don's appear to be on the board. Why are they on there? Why ...