For me, I also like having a copilot at my side, since I let her do the comms during flight, as, I believe, IRL. I have used the Mugz mod for dev version. The problem is, at least with FBW installer, I get updates to FBW A320 almost daily, so I understand It’s quite difficult to keep up with that.
For instance, yesterday I installed an update for Mugz mod from the previous day and also last update for FBW A320. The result was black screens in cockpit, including radios, and no copilot.
I use the MSFS Addon Linker by bad2000, to turn mods on and off with ease, so I managed to determine the issue was with the copilot mod. After I turned it off, everything worked fine with the plane. I’m waiting to get a new update for the copilot mod before trying it again.
P.S the Addon Linker also available in flightsim.to.