App questions - is there documentation somewhere?

Hi all, new driver here (2 weeks). I have a few questions about the app and can't find any documentation on Uber's site (aside from a couple of random questions in the Help area).

I know these are all RTFM kinds of questions, but I can't find the manual! I actually love reading manuals. If there is a manual, please let me know! I can't find it.

When en route to a pax, the app shows a box with a time inside it on the pin (usually "3 min" or "1 min"). That time doesn't appear to change. What is it? I thought it might be a timer since the pax put the request in, or a timer for how long I've been waiting since the rider was notified that I arrived... but it doesn't seem to ever change.

Is there any way to orient Uber's navigation to my car's orientation, instead of due north? I use Google Maps for most of the ride but flip back to Uber as I approach the pin to get as close as possible, and the Uber map is always oriented due north (so if I'm traveling south, a right-hand pickup shows left on the map). Clicking the compass/waypoint icon only seems to re-center the map on my GPS location and doesn't change the map orientation, like most navigation apps do.

When the little lightning bolt surge hexagon shows up in the top right corner of the app, does that mean there is a surge somewhere nearby? Sometimes that icon appears; other times it is not there. It is always gray (it would be nice if it lit up orange when there was a surge). Clicking it shows the multiplier vs surge color, but often when the icon appears there is no surge coloring on my map, regardless of whether I zoom in or out. So, then, what determines if that icon is there or not? Is its only purpose to show me the color scale?

Thanks in advance for your help!