In the UK our facelift has coolant temp on the left and boost on the right, as well as oil temp in the digital display.
The boost is not useless at all, because you can use it to drive off boost whilst the oil temp is below 90. You should be driving in a way where the boost gauge never moves which is quite easy unless there's a hill nearby.
Coolant goes up quickly.
I generally start my car up and leave it running whilst opening my gates, then drive it slowly out of boost until the oil temp is above 75, and then a bit harder, there's a motorway near me I reach around this time.
Apparently idling when cold is worse for the car than driving it when cold., all of the handbooks for cars tell you to drive it instead of idling, because there's more oil pressure.