Mound visits are criminally underutilized in TB (at least at the younger ages..)...
We used them a lot this year with DD’s team. If I went out it was for pitchers/catchers conference. If our other AC went out it was an overall defensive conference.
I found that if I could break the mental cycle of whatever the pitcher was fighting their next 3-5 pitches would actually be better and they would rebuild from that. Sometimes I won’t even address the problem of their bad pitches or that they just walked 2 hitters. We’ll talk about the current/next hitter, signs, how hot it was or whatever. DD sometimes will ask me directly what I was seeing wrong mechanically. Mostly it was just getting her out of the mental rut she’d gotten into. A quick breather and a reset can do wonders.