We develop a low-energy continuum model to describe the moir'{e} physics of heterostructures, which is a generalization of the celebrated Bistritzer-MacDonald (BM) method [Proc. Natl. Acad. Sci. U.S.A. , 12233 (2011)]. We take as an example the moir'{e} physics of electrons in twisted bilayer kagome metals near $1/3$ filling where monolayer Dirac cones lie. We demonstrate the emergence of magic angles where significant local band flattening occurs as a high-order Van Hove singularity appears and find a momentum-dependent anti-unitary particle-hole symmetry potentially enabling stable topology. We, furthermore, show that while sublattice interference effects are present, their role is not as prominent as in monolayer kagome.