  Several astrophysical scenarios have been proposed to explain the origin of
the population of binary black hole (BBH) mergers detected in gravitational
waves (GWs) by the LIGO/Virgo Collaboration. Among them, BBH mergers assembled
dynamically in young massive and open clusters have been shown to produce
merger rate densities consistent with LIGO/Virgo estimated rates. We use the
results of a suite of direct, high-precision $N$-body evolutionary models of
young massive and open clusters and build the population of BBH mergers, by
accounting for both a cosmologically-motivated model for the formation of young
massive and open clusters and the detection probability of LIGO/Virgo. We show
that our models produce dynamically-paired BBH mergers that are well consistent
with the observed masses, mass ratios, effective spin parameters, and final
spins of the second Gravitational Wave Transient Catalog (GWTC-2).
