Can you please send a picture of the damaged ESCs? Which component blew up? Also what do the labels on the ESD bags from those ESCs say?
The 6s version of M0129 (mini ESC) should have a small label on the white 4-pin connector that says either -63 or -65 (meaning 6S and either 3.8V or 5.0V output for VOXL2 mini or VOXL2). We can also check using the serial number (label should be present on the ESC)
https://docs.modalai.com/voxl-mini-esc-datasheet/#specifications
aa7bc73c-90f7-41ae-9f28-cacb800c72eb-image.png
Alex