If you tap the screen (or swipe, I don't remember) you should be able to switch to the next metric. If pace isn't there, then go to settings and there should be a list of available metrics and turn on the pace. That said, yes, Fitbits are horrible when it comes to tracking running. As a runner, I see Fitbits as the lowest-shelf product. Inaccurate, and missing lots of features runners usually need. It hasn't been improved in years so unlikely that will be addressed.
