Mixing and $CP$ violation in Charm deacys at LHCb

Two measurements of mixing and $CP$ violation in charm decays performed at the LHCb experiment are presented. The former is a measurement of the mixing observable $y_{CP}-y_{CP}^{K\pi }$ in two-body $D^0$ decays, while the latter is a search for direct $CP$ violation in $D_{(s)}^{+}\to {\eta }^{{(}^{\mathrm{\prime }})}{\pi }^{+}$ decays.