  The family of AV$_3$Sb$_5$ (A = K, Rb, Cs) kagome metals exhibit charge
density wave (CDW) order, proposed to be chiral, followed by a lower
temperature superconducting state. Recent studies have proposed the importance
of band structure saddle points proximal to the Fermi energy in governing these
two transitions. Here we show the effects of hole-doping achieved via chemical
substitution of Sn for Sb on the CDW and superconducting states in both
KV$_3$Sb$_5$ and RbV$_3$Sb$_5$, and generate a phase diagram. Hole-doping lifts
the $\Gamma$ pocket and van Hove singularities (vHs) toward $E_F$ causing the
superconducting $T_C$ in both systems to increase to about 4.5 K, while rapidly
suppressing the CDW state.
