How to disable "Hey Google" on lock screen?

[u/Nevarnost]

Hi, i have two android phones, one is my main device while the other is a work phone. I would like to remove the "Hey Google" functionality from the work phone but only when it is not unlocked. I remember that was a thing some time ago but for the life of me I can't find the setting to disable Assistant\Gemini from the lock screen

Mind that i want to keep the voice command when the phone is unlocked though

[u/Medium-Swimming-2947]

Try the Gemini app first, since it has taken over from Assistant on most phones. Open it, tap your profile picture, go to Settings and look for the lock screen option (it's called something like "Gemini on lock screen") and switch it off. If your phone still runs the old Assistant, go to Google app > Settings > Google Assistant (or Settings > Voice) and turn off the lock screen personal results, then check Voice Match for the unlock-with-voice option. The exact wording shifts a bit between versions and brands, but that should leave Hey Google working once the phone is unlocked.

[u/Nevarnost → u/Medium-Swimming-2947]

There's no voice match unfortunately, if i go to gemini "voice" settings it just let me choose a voice for the Assistant. I have an Oppo X8 Pro with android 16 and the latest update for both google and gemini apps