I'm looking at the process of blowing the eFuse during production, and it's mentioned in AN221111 that "Also, the supply voltage VDDD must be set to 2.5 V to program eFuse". Our module is powered with a 3.3V LDO. What would happen if VDDD is 3.3 instead of 2.5? Could we still blow the eFuse?
From the datasheet, it's between 2.38V and 2.62V, so 2.5 is indeed required.
I just tested programming a PSoC using the Miniprog3's voltage at 2.5V while the PSoC's LDO was off and it worked, so it seems I can bypass my 3.3V problem this way.