At the end of the day, you're never going to know how or what that company is doing in terms of anti-cheat, unless you go and work for them.
I'm privileged to have worked for one of the large ones directly, but the rest of them - nobody is going to really know what they're doing.
I don't think with Battlefield or COD - anything is being measured or automated in any sort of way that can be effective, (other than stuff like Easy anti-cheat or whatever) because there are so many cheaters in those games - and so many players screaming about the problem, clearly - the studio isn't prioritising that problem - what ever system they have in place, isn't delivering any impact.
But - like I say, you'd have to go and work there to be 100% sure,