  We present predictions and postdictions for a wide variety of hard
jet-substructure observables using a multi-stage model within the JETSCAPE
framework. The details of the multi-stage model and the various parameter
choices are described in [A. Kumar et al., arXiv:2204.01163]. A novel feature
of this model is the presence of two stages of jet modification: a high
virtuality phase (modeled using MATTER), where coherence effects diminish
medium-induced radiation, and a lower virtuality phase (modeled using LBT),
where parton splits are fully resolved by the medium as they endure multiple
scattering induced energy loss. Energy loss calculations are carried out on
event-by-event viscous fluid dynamic backgrounds constrained by experimental
data. The uniformed and consistent descriptions of multiple experimental
observables demonstrate the essential role of coherence effects and the
multi-stage modeling of the jet evolution. Using the best choice of parameters
from [A. Kumar et al., arXiv:2204.01163], and with no further tuning, we
present calculations for the medium modified jet fragmentation function, the
groomed jet momentum fraction $z_g$ and angular separation $r_g$ distributions,
as well as the nuclear modification factor of groomed jets. These calculations
provide accurate descriptions of published and preliminary data from
experiments at RHIC and LHC. Furthermore, we provide predictions from the
multi-stage model for future measurements at RHIC.
