I think I have all the settings correct, but the watch does not speak the pace every mile during a run. Any advice?
If you're expecting the automatic 1 mile pace alerts voice to come from the speaker on the watch itself, that is only for calling and music playback. For pace alerts and other voice audio prompts, you'll need Bluetooth headphones. This is the same as the Venu 2 Plus.
You might be right. I have the venu 2 plus, and just assumed the venu 3 was the same in that regard. I had to make sure by going to dcrainmaker's blog - Garmin Venu 2 Plus In-Depth Review | DC Rainmaker
No, it doesn’t do so-called voice/audio prompts for laps and such like the Forerunner and Fenix series can. It’s a quirky omission.