On mobile or desktop? If you’re on desktop just go to settings and search for “autocomplete” - it might be under Google sync settings or advanced -> privacy se

On mobile or desktop? If you’re on desktop just go to settings and search for “autocomplete” - it might be under Google sync settings or advanced -> privacy settings for “use prediction service to help complete searches and urls” If I’m wrong, it’s only because I’m using MS Edge and this was a question it asked during setup :)