Recent Scanning Tunneling Microscopy (STM) experiments measuring the superconducting gap features in thin films of superconducting bilayer nickelates ${\mathrm{La}}_2{\mathrm{PrNi}}_2{\mathrm{O}}_7$ at ambient pressure and compressive strain paved the way to study the Cooper-pairing models and the band-selective identification of the gap features in these systems. Here, using the realistic two-orbital bilayer model and the continuum Green's function formalism, we theoretically analyze orbital and band-selective local density of states as well as the corresponding STM spectra. We find that the multiorbital character and the spatial dependence of the Wannier functions lead to characteristic features in the spectra that depend on the position of the STM tip. This allows for a band-resolved analysis of the superconducting coherence peaks and scattering momenta. We identify a clear route for experimental measurements not only to determine whether the $\gamma$ band is incipient, but also to identify the band origins of the coherence peaks through tip-height-dependent measurements of the local density of states and its impurity-induced corrections.

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• Superconductivity
• Nickelates
• Strongly correlated systems
• Many-body techniques
• Scanning tunneling spectroscopy