Due to absence of Pycom modules we too developed similar ESP32-S3 based module more tuned to our needs. Now in waiting for new PCBs.
Removed all failed packages from dead Pycom modules for damage assessment. Turned out that in some only voltage regulator fried, these are usable when powered from 3.3V via 3V3 output. In some only ESP32 chip fried. The rest has both chips fried.
Still would be nice to know which voltage regulator is used in original Pycom ...py modules. 5.5v max input voltage, 3.3V output voltage, 1.2A current, BGA-like package with balls in 2x3 layout (WLCSP-6 ?) with 0.40mm (?) pin space. Has tiny NS19 marking around 1st ball dot. Ball 1 is Vout, BALL 3 - Vin, ball 4 - GND, ball 5 - presumably FB, ball 6 - most likely EN(able). Unusual inductance - 3.4uH which most likely is 3.3uH in circuit diagram. Switching regulators in tiny ball packages usually have 1.0uH or even 0.5uH or 0.4uH inductance. Might be this is some sort of adjustable buck-boost regulator with adjustable output voltage. Spent all evening in searching for something compatible, no success so far.