Checking and unchecking Use Device Map in Lens Blur doesn't update the Focal Range histogram.
To reproduce in LR 13.0.1:
1. Import this HEIC with a camera depth map:
https://www.dropbox.com/scl/fi/us562okxbc76t2q8gzxd7/depth-map.2023.11.01.heic?rlkey=182qxsw53lmpiqr...
2. Apply Lens Blur and click Visualize Depth.
3. Toggle .... > Use Device Map in the upper-right corner of the Lens Blur panel. Observe that the visualized depth map changes but the histogram remains the same:

The histogram should change to match the currently display depth map.