While at-home testing kits are hard to come by now, and community testing is all but shut down, hospitals still have plenty of availability to run tests. If someone is admitted as an inpatient to a hospital for respiratory issues so severe they end in death, there is an overwhelming likelihood that patient is getting tested for COVID. Particularly due to their legal liability for allowing someone to die due to an undiagnosed infection.
So yeah, we don’t have good numbers for a raw number of active community infections anymore, but the fatality numbers should still be around as accurate as they ever were.