Top is MC7805 which powers the ADS1115 circuit for wheel angle sensor
Next down is K7805 which powers the Teensy
Bottom is the K7803 which powers the Micros
The micro will not power through USB, it must have the 12v input power to energize the K7803.
After you have the Micro powered, then connect the USB cable. If you don’t get a port, you may need to reflow the solder on the 5 pins under the middle of the USB port. JLC has had some trouble getting those soldered completely.