An Uber will not let you carry a weapon in the car if you are a driver.
...
But some do anyway. A few months ago a driver dispatched a bad guy in Miami.
They would never know if you were carrying unless you had to use it. I would carry if I was a driver. If I had to use it, Uber would no longer allow me to drive...oh well, no biggie, at least I would still be a live to find another side job.