  We consider dynamical environments of (486958) Arrokoth, focusing on both
their present state and their long-term evolution, starting from the KBO's
formation. Both analytical (based on an upgraded Kepler-map formalism) and
numerical (based on massive simulations and construction of stability diagrams
in the 3D setting of the problem) approaches to the problem are used. The
debris removal is due to either absorption by the KBO or by leaving the Hill
sphere; the interplay of these processes is considered. The clearing mechanisms
are explored, and the debris removal timescales are estimated. We assess
survival opportunities for any debris orbiting around Arrokoth. The generic
chaotization of Arrokoth's circumbinary debris disk's inner zone and generic
cloudization of the disk's periphery, which is shown to be essential in the
general 3D case, naturally explains the current absence of any debris in its
vicinities.
