This is what Chipmunk says:
We are very sorry, but this serial number does not make sense...
And this is what the serial number decoder provided by kitCAC says:
Results for Apple serial number JM4PxxxVJ
This device was made in week 4 of 2014.
Click here to see what an Apple may be worth (via previously sold items on eBay)
Apple serial format= 2010 onward
Date of manufacture= Week 4 of 201
Nothing else, no model info
In the iPhone settings, in "about" it says "iPhone SE" not SE2022 or SE 3.
So... I suspect Am_a_zon UK sold me a (very sophisticated, I grant them that) fake or refurbished or renewed or who knows what kind of product... and not a genuine, absolutely new, untouched iPhone.