I just ordered one and I'll keep yall updated on how the build process goes.

I hope you opted for M5Stack Core2 ESP32 AWS Development Kit with built in Secure Element.
It costs couple of dollars more than regular M5Stack but it is superior in many ways, with built in encrypted chip ATECC608 that makes it safer, touch screen, almost five stronger and better battery, longer type-C USB cable, and size is almost the same as basic M5STack.
Only problem is they run out of stock very quickly so you need to be fast when ordering

I think the Bowser wallet is a neat project, but should only store small amounts of bitcoin, if any. Have you tried flashing the AWS one? I don't think it works