The compressor has no clutch, so it is always spinning. The RCV controls (via duty cycle) the amount of displacement the compressor has, which varies from 0% to 100%.
All US-spec vehicles will be equipped for both hot and cold climates, if there is a setting or equipment that dictates such, because we have both. Volkswagen does not make "regional" spec cars. Canada may only get cold country, and Mexico may only get hot country, but we get both (if that makes any sense).
You will need an appropriate VAG-capable scan tool to verify the coding of the Climate module. You will also need same for verification of compressor command, duty, and pressure. However, given the now decade+ issue of dealing with RCVs in all kinds of compressors, I would say more than likely that is the source of the issue.
I feel like the process by which the components of the A/C system are manufactured and cleaned before assembly is much to blame, as small particles get lodged in the RCV's tiny orifices and screen, and make it stick not allowing full displacement stroke of the compressor, and thus slow to cool and poor cooling in general. Because most of the time, like 95% of the time, once the car's original RCV (and related manufacturing leftovers trapped within) is replaced, that car's system works fine and will continue to do so.
So again, without overthinking this, scan tool ---> verify coding, check pressure (scan tool pressure, I do not care what a gauge says) and command (if you want, since you really won't know exactly what you are looking at, you can always do a before and after), then replace the RCV.