Hello Martin,
It is indeed possible to change the VCCIO_0 voltage from 3.3V to 1.8V by replacing certain resistors. However, the main problem is that FLASH S25FL127SABMFV10 only works with a supply voltage of 3.3V. To convert, you will also have to change this component to 1.8V compatible.
Please remember that such interference with the operation of the module automatically voids your warranty.
Best regards,
Vadim