There's at least 6 to 10 very close pitches per game that could be challenged. I did fund this, not sure if it was implemented?
"For Tuesday-Thursday games in Triple-A and the ABS-equipped FSL parks, the ABS system will call all pitches. The home plate umpire will relay the call after hearing it in their earpiece. The ABS challenge system will be in effective for Friday through Sunday games. The home plate umpire will call pitches, but the batter, pitcher or catcher can appeal their strike call. The ABS system will then rule on whether the call stands or is overturned. Each team gets three unsuccessful challenges per game. Successful challenges do not count toward that total. All challenges must be made within two seconds of the call."
https://www.baseballamerica.com/stories/milb-rules-changes-for-2024-will-tweak-strike-zone-in-triple-a/