Continuing the discussion from Duplicating microSD cards:
I’d need more detail to guess why your copies don’t work. The very easiest way to make a single copy of a working microSD card is to use your Raspberry Pi. With the Pi running the existing card, put the new card in a USB adapter, plug it in to a USB port on the Pi, click the Raspberry on the top left, then “Accessories” and “SD Card Copier.”
I’ve written a lot of stuff about making multiple copies of an SD card.