v2 — slash / encoding variants
Land on Settings→Bluetooth = WORKS. "invalid address" = blocked.

Authority-slash forms

A. prefs://root=Bluetooth B. App-Prefs://root=Bluetooth C. prefs://root/Bluetooth

Root-only (no sub-path) — does bare Settings open?

D. prefs: (bare) E. App-Prefs: (bare)

Path-style variant

F. prefs:root=Bluetooth&path=Bluetooth