Ummmm.
Any country with the knowhow to make an ICBM can source or build a gps receive without said restriction. Just saying.
That's like putting a sign "no burglary permitted" and leaving the door wide open.
You’ve just described a significant amount of ITAR. Am Canadian but have to deal with it occasionally. MWIR/LWIR imagers are another prime example. I can order way better (spec-wise at least) IR sensors from AliExpress than I can from the US. Something about high frame rate IR being useful for some kind of guidance towards hot things shrug
Just cause the rule is dumb doesn't mean it can be ignored...
I've recently seen a very concrete example of a Chinese CRPA GPS/Glonass/Galileo receiver which is being integrated into some Russian UAVs. It's a COTS thing the vendor in China will sell to anyone. In addition to not obeying any arbitrary limits on GPS speed/altitude it's a 4-element small array for better signal discrimination.