The District of Delaware generally suspended its mediation program in 2021, and mediations before a magistrate judge rarely happen in patent cases these days (although they do sometimes happen in some other cases, such as employment cases).
Since then, parties have sometimes moved to private mediations—especially when ordered to—but generally in my experience the overall number of cases that go through mediation has declined, and there aren't a huge number of local patent-case mediators.
When we last discussed this, we noted from comments at the 2023 Bench and Bar conference that …