  This proceeding presents the latest studies on the Yukawa couplings of the
Standard Model Higgs boson with 139 fb$^{-1}$ data collected using the ATLAS
detector at a center-of-mass energy of 13 TeV. A first direct probe of $CP$
violation in the top-quark Yukawa coupling using events where the Higgs boson
is produced in association with top quarks ($t\bar{t}H$ and $tH$), and decays
into two photons ($H \rightarrow \gamma \gamma$ ) is discussed. The latest
results on the Higgs boson production in association with a $W$ or $Z$ boson
($VH$) in the $H \rightarrow b \bar{b}$ channel are depicted as well. Finally,
the searches for Higgs boson decays into two muons ($H \rightarrow \mu^{+}
\mu^{-}$) and two electrons ($H \rightarrow e^{+} e^{-}$) are presented.
