Coolant got radiator and fans cooling it down, oil on the other hand doesn't and oil in contact with piston directly....no not saying it will climb (honestly doesnt matter if it climbs abit), but if u have more accurate gauges and try monitor the oil temps, assuming the car is all warmed up and has soaked up heat, you will definitely notice the oil gets abit hotter when idling away in a jam compared to cruising away...
my case the on dash gauge too just goes to a certain point and sits there forever... but the oil temp gauges can show quite a dif.
tldr: unless ur absolutely pushing your car to the limits, cruising temps are typically cooler than idling in jams