I don’t think so… Search discoveries is currently disabled on Meta which is why we can’t see the setting here.
I can still see it when I test it out locally…
@shuao23 If you the site has the feature enabled (i.e. SiteSetting.ai_bot_enabled = true and SiteSetting.ai_bot_discover_persona is set) it should be configurable for each user at: /my/preferences/ai by toggling 
Enable search discoveries.