  Sterile neutrinos with keV-MeV masses and non-zero transition magnetic
moments can be probed through low-energy nuclear or electron recoil
measurements. Here we determine the sensitivities of current and future
searches, showing how they can probe a previously unexplored parameter region.
Future coherent elastic neutrino-nucleus scattering (CE$\nu$NS) or elastic
neutrino-electron scattering (E$\nu$ES) experiments using a monochromatic
$^{51}$Cr source can fully probe the region indicated by the recent XENON1T
excess.
