User cnst is currently one of four moderators on Law SE.
They have not visited the site since early December 2020 (eleven weeks inactive at time of writing).
They are also a high-reputation user on several other sites, and have been inactive for a similar or longer period of time (from ten weeks, up to eight months).
This is not the first time they have been totally absent for an extended period. When the issue was raised previously, the response was "we're doing fine without them, and they haven't officially quit, forget about it".
It is clear that they have abandoned the site and possibly the network as a whole, without notifying the community.
I find this highly problematic:
someone has access to PII but pays no attention to whether their account is used, and would not notice if the account was compromised, a major security risk
someone has access to moderator tools but has no concern for the community, especially its recent development, and will cause unnecessary harm when applying tools in ignorance or carelessness
If the active moderators are having trouble keeping up, this user is not meeting their responsibility, and must make leaving official so we can elect a more productive replacement.
If, as I think is more likely, the active moderators are doing fine regardless, cnst has all the access and power of a moderator but bears none of the responsibility, and there is no need for them to keep it. The diamond should be removed until the user has shown involvement with the site and the trust of the community.