They can I think but they don't because it's too much hassle for them, same with speeding and other road/traffic offences like mobiles etc
Truck drivers are on a different page as they are on national licences as you mentioned, and it's the rta/vicroads etc that chase them more, cops only try get them for speeding/drugs
HWP can book anywhere I got done more than 50mins from a HWP's jurisdiction, If they want to they will pull you over