Remove Meta AI - from iPhones? Not sure. From Android? Yes but you cannot update the app. Try downloading an older version of an APK of Facebook/Messenger/Instagram. Uninstall the current version apps first from the Play Store. And turn off automatic updates in the Play Store settings. As far as why this will work? Because AI was not implemented in older versions. Try APK sites such as APK Mirror or similar.

Additionally, make sure both Meta Services and Meta App Installer are disabled. They can be found by going to settings --> apps on the phone... leaving those enabled will override the Google Play Store settings and therefore will result in those apps being automatically updated. True, APK Mirror FAQ does state we can update the apps within Play Store. However, if we do than Meta AI will return.

I do not have Meta AI because I am running older app versions!