  Many well motivated dark matter (DM) particle candidates can decay into
detectable X-ray photons. We analyze the Final Equatorial Depth Survey (eFEDS)
data from eROSITA early data release to search for unidentified X-ray lines
that could indicate DM signals. Having discovered no anomalous signal, we set
limits on DM decay rate in mass range between 1.8-18 keV, and constrain the
parameter space of two DM particles: sterile neutrino and axion-like particles.
Finally we also study the projected sensitivity of eROSITA full sky search,
showing that eROSITA all-sky survey is expected to set the most stringent
limits in the soft X-ray band.
