To clarify, there’s no obvious point at which you’ll know an automatic watch is fully wound. When this condition is reached the mainspring will slide around the inside wall of the barrel so its impossible to do damage. Sometimes this can be felt through the crown, especially if the barrel wall has cut- outs to allow the spring to slide in controlled increments. On the Miyota its hard to detect any change, but if you give the crown 55 twists it’ll be fully wound, I’ve worked on a few and that’s what it takes to fully wind them.
If you’re wearing the watch in a low state of wind the timekeeping will deviate significantly from what you expect, the amplitude will be too low to get into the region where the watch behaves as it should.