Never buy a proper road bike, Abu. You'll find lots of different manufacturers make tyres, but you are limited to high pressure within a 700c 23-28 range.

Personally, I think the range for the bikes you mention is just fine. Remember, these aren't mega sellers like the road, VTT, electric or even hybrid options. Also, folding bikes have a rather specialized usage, and most owners will have a "normal" bike as their daily ride.

All of which is off topic. Tyre did the supermarket run without problems, so increasing to 100 psi shortly.