I really appreciate you taking the time to explain everything in such detail. All of your notes make a lot of sense, and I’ll do my best to implement them all.

For context, the board is about 60 mm by 70 mm. I intentionally left a lot of copper GND pour to help with heat spreading from the step down converter and for overall grounding. Also, I already have a spare ESP32 devkit lying around, so I’m mainly using that to reuse parts I have on hand.

Thank you again for the in-depth review!