AFCI Compliance with Multiple First Outlets on [Multiwire] Branch Circuit
&quot;First Outlet&quot; is pretty clear.
You would need to blow that out to a 2-gang junction box, and put a GFCI+AFCI+receptacle combo receptacle on the black wire, and an AFCI on the red wire.
It could be an AFCI receptacle if GFCI protection is not needed there, otherwise it would need to be another GFCI+AFCI+receptacle combo device, or an AFCI deadfront.
... and this is why MWBCs aren't worth it anymore.
MWBCs used to be a nifty way to save some pennies.  But we sure aren't saving pennies here, are we?
AFCI and GFCI requirements basically ruined MWBCs.  It's time to stop using them.
I only use MWBCs when I need 5-8 circuits in a 3/4&quot; conduit that I can't afford to lay another pipe alongside of.