### Aux-Fig 02a - Diff. Fid. XS for $\phi$ $4l$

Inclusive and differential fiducial cross sections of the Higgs boson are measured in the $H \to ZZ \to 4l$ ($l$ = $e$;$\mu$) decay channel. The results are based on proton-proton collision data produced at the Large Hadron Collider at a centre-of-mass energy of 13 TeV and recorded by the ATLAS detector from 2015 to 2018, equivalent to an integrated luminosity of 139 fb$^{-1}$. The inclusive fiducial cross section for the $H \to ZZ \to 4l$...