The UniFi TV Box (primarily the unifi Plus Box) does not require a specific standalone password to enable Developer Options; rather, it uses the standard Android TV unlocking process, though some firmware versions may require your device PIN (default 123456) for confirmation.

for sideloading third-party apps or fine-tuning system performance. While the standard Android TV method of tapping the "Build" number works to reveal the menu,

Implementation checklist (developer-facing options to add/configure)

Go to Device Preferences: Scroll down and select Device Preferences (or System on newer firmware).

this feature behind a technician-level password that is not shared with the public. Workaround Attempt: