I have a 1-gang duplex outlet under the sink in my kitchen. The two outlets are on separate phases of a single MWBC circuit. One of them powers the garbage disposal, and is controlled by a switch. The other powers the dishwasher.
I want to put them behind CAFCI/GFCI. But for whatever reason, 2-pole dual-function breakers do not seem to exist, even though both 2-pole CAFCI and 2-pole GFCI are available. (That sounds completely illogical to me, by the way.)
I suppose one way is to use a 2-pole CAFCI breaker with a GFCI outlet. But I couldn't find duplex GFCI receptacles where the GFCI mechanism can handle MWBC (either with two independent GFCI or with a 2-pole GFCI). Do they exist?