Itβs hard to say if itβs overwatered or not to me, you could just have darker soil mixed try adding some pumice or perlite to help lighten and help drain the soil better. The stock looks good and healthy. There doesnβt seem to be any rot forming, and they are very sensitive to overwatering.
Aeonium really love light. Mine got less leggy and starting sizing up when I put them in a south window. I really need to lop their heads off and propagate it, but I canβt bear too, so I just deal with the leggy look! (Obviously this one isnβt a black aeonium, but same idea)