>a release three months ago

Calling that 'dead' and demanding status updates is the overreaction here. Unless you're paying this person to work on it full-time.

One of the bits of software I use has an update as recently as 2019, and before that 2015 and two 2013. It's clearly still relatively active. For software released in its current form in 1997, after being ported from an older version.

Even if modern software might sometimes need more frequent updates, it's still pretty demanding to insinuate death and demand status notes from an open-source maintainer just because they're not moving quick enough for you.