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My temp didn't show up with the new update. In the past, it wasn't visible unless the app has interrogated the car for information (like after turning on the A/C, as you mentioned). And then the temp seems to linger for a while, but eventually will not show again until you interact with the A/C again.
I have not done it for a while but I'm pretty sure you can create a destination to navigate to by pressing and momentarily holding your finer on the destination location on the touchscreen map.