  We infer the evolution of the UV luminosities of galaxies in haloes of masses
$10^{10} - 10^{11} M_{\odot}$ in the redshift range of $z \sim 9-16$ from the
recent JWST data. Within the standard $\Lambda$CDM cosmological model, it is
found that the average luminosities in this halo mass range show an exponential
evolution with redshift, in excess of that expected from astrophysical
considerations including the evolution of UV luminosity from Population III
galaxies. We find that an enhancement of power on scales $k \sim 1$ Mpc$^{-1}$,
as captured by a cosmological transfer function modified from the $\Lambda$CDM
form, is able to alleviate this effect and allow for a non-evolving UV
luminosity as a function of redshift at $z > 10$, consistently with the
corresponding findings for lower redshifts. We discuss the possible
astrophysical and cosmological reasons for such an enhancement.
