Cloning HD iCLASS MIFARE Px DM18Y

There’s a lot going on there.

I think you could be correct

Do you have a bright torch / flashlight :flashlight:
If you shine the light from the back, you should be able to see the antenna(s)
LF likely circle in the middle
HF likely Rectangular, following the perimiter of the card

Possibly, we just need a little more information

Can you scan the card you want to copy with TagInfo ? and repeat with your blank cards you currently have
this will tell us the HF chips they have