What helped me was shifting the tone from judgment to curiosity. Instead of pointing at low numbers, I ask what challenges they faced that week and compare it with activity trends. I found practical ideas in this article
https://www.teamgate.com/blog/boosting-sales-teams-responsibility-through-better-activity-tracking/. It explains how tracking can support responsibility rather than pressure. When reps see data as feedback instead of criticism, coaching sessions become collaborative.