I have the “Enable when detected blur is” setting set to “Low (Soft) and above”.
Give TPAI an image for which it decides it has low blur. This can be confirmed by hovering over the sharpening tab. The tooltip will appear and say “Autopilot detected Low blur in this image”.
TPAI should therefore enable sharpening, but it does not.
Topaz Photo AI v2.1.1 on Windows