My calendar stopped speaking awhile ago, but I didn't have time to deal w/it. Finally got around to it this morning, & called Apple Accessibility desk. The fix was to go to 'Settings > Voiceover > Screen Recognition' & deselect the calendar app. She also told me to deselect the camera app as well. Following that, we turned off screen recognition, & power cycled the phone. When it came back up, my calendar was back. I'm fairly good at this stuff, but that 1 absolutely flew under my radar. Just posting this in case anyone else is having VO weirdness & screen recognition is enabled. Maybe try these steps & see if it helps. Heidi at the Apple Accessibility Desk says this is a known problem, and that they're working on it.
Yall have a good rest of your weekend.