Announce Messages with Siri option not showing up in my settings (iPhone XS, iOS 13.3)

Hello, I am having trouble with Announce Messages with Siri: although I am currently in iOS 13.3 (so I should have it) it doesn't appear in my settings neither under 'Notifications' nor under 'Siri and Search'. I have AirPods 2nd gen and I have already tried restarting my iPhone and forgetting the AirPods and reconnecting them but it still doesn't show up. Does anyone know how to fix this?