I'm sure bike headlamps do have directional dips Paul. I was sold a US spec Guzzi back in the 70's and that certainly dipped to the right.
Regarding travelling abroad with halogen or LED headlamps, it should only take a couple of minutes each side to swap to right hand dip units. A good investment if your abroad regularly.
Thaks Richard - not sure where I got that bikes had non-directional dipping (maybe it is in the US? for example these LEDs are inexpensive BUT dont seem to have a directional dip...
https://www.amazon.com/Wisamic-Motorcycle-Headlight-Compatible-Fatboy-Black/dp/B01M63N6PJ )