ROM Hack So I want to buy a NEW Switch. What do I have to look out for

[DNStuff]

I am located in Germany. I have heard of patched Switch units in USA and in Japan. Does Europe also already have patched units? Can I see the serial number code outside of the box or do I need to open the box in order to find out if I can hack this Switch or not?
I thought of going to a store and looking at the serial numbers.

 

[Kukielka]

Just dont get a XAJ7004, or get a Game Bundle to be certain.
Pretty much it atm.