I was wondering about this as well, but I'd suspect any signal would get lost in the noise. People getting sick and sleeping more, people working from home, people checking online for news about the virus, the government shutting down internet access to prevent the spread of panic, etc. are all things that would drastically change internet usage patterns, but wouldn't necessarily be indicative of anybody dying.

Not necessarily saying any of those things (e.g., shutting off internet access) have or will occur - I'm pretty ignorant of the situation on the ground. I'm just saying that from a statistical perspective, I'm afraid it'd be a needle/haystack situation.