I can provide some general advice on serving etiquette when it comes to chips or any shared food item.
When serving chips (or any shared food) at dinner, it's generally considered polite and fair to serve everyone an equal portion initially. If there are any extra chips left in the bag or serving bowl after everyone has been served, you can ask if anyone would like more before taking additional portions for yourself.
If you are the host or the one serving the chips, it's good practice to be mindful of the guests and make sure they have enough before considering taking extra for yourself. If everyone is done eating, and there are still chips left, then you can certainly help yourself to the remaining chips.
The key is to be considerate and avoid taking significantly more than others unless you have received clear permission to do so. Remember, it's always better to be generous and inclusive when sharing food among friends or family.