  In the framework of collinear factorization and next-to-leading order (NLO)
perturbative QCD, we make predictions for inclusive and diffractive dijet
photoproduction in electron-proton and electron-nucleus scattering in the EIC
kinematics. We establish kinematic ranges in the ${\bar p}_T$, ${\bar \eta}$,
$x_A^{\rm obs}$ and $x_{\gamma}^{\rm obs}$ variables, quantify sensitivity to
small-$x$ nuclear PDFs, and analyze various scenarios of factorization breaking
in the case of diffractive scattering.
