The study investigates the absence of phonon-mediated superconductivity in La$_3$Ni$_2$O$_7$ under pressure, despite the emergence of superconductivity with a high transition temperature ($T_c$) of approximately 80 K above 14 GPa. Using density functional theory (DFT) and Wannier interpolation techniques, the researchers examine the phonon properties and electron-phonon interactions in La$_3$Ni$_2$O$_7$ under 29.5 GPa. Their findings indicate that the electron-phonon coupling is insufficient to explain the observed high $T_c$. Instead, strong Fermi surface nesting is identified as a more plausible explanation for the experimental charge density wave (CDW) transition in La$_3$Ni$_2$O$_7$. The calculations confirm that La$_3$Ni$_2$O$_7$ is an unconventional superconductor, with the superconductivity likely arising from strong electronic correlations rather than electron-phonon coupling. This work also highlights the importance of considering unconventional Cooper pairing mechanisms in nickelates.The study investigates the absence of phonon-mediated superconductivity in La$_3$Ni$_2$O$_7$ under pressure, despite the emergence of superconductivity with a high transition temperature ($T_c$) of approximately 80 K above 14 GPa. Using density functional theory (DFT) and Wannier interpolation techniques, the researchers examine the phonon properties and electron-phonon interactions in La$_3$Ni$_2$O$_7$ under 29.5 GPa. Their findings indicate that the electron-phonon coupling is insufficient to explain the observed high $T_c$. Instead, strong Fermi surface nesting is identified as a more plausible explanation for the experimental charge density wave (CDW) transition in La$_3$Ni$_2$O$_7$. The calculations confirm that La$_3$Ni$_2$O$_7$ is an unconventional superconductor, with the superconductivity likely arising from strong electronic correlations rather than electron-phonon coupling. This work also highlights the importance of considering unconventional Cooper pairing mechanisms in nickelates.