Black holes do not eat fermion matter., because fermion propellers seem to flip 180 degrees at the horizon, by the spacetime vortex concentration around the horizon, by the eating of the space Lattice (Axion-Higgs ?). BHs of different sizes they ONLY eat each other.
BHs of even mass seem to form Herbig Haro systems leading to two Hotspots (Bow shocks) far away perpendicular to the plasma disc.
See: The Magic Fermion Repelling Stringy Fuzzball Black Hole, the origin of a Cyclic Raspberry Multiverse.
https://vixra.org/pdf/1909.0417v2.pdf