  Dark matter is thought to make up most of the matter density of the Universe,
yet its true nature remains uncertain. Among dark matter theories, Weakly
Interacting Massive Particles (WIMPs) are a prominent candidate for dark matter
because they can reproduce the observed abundance of dark matter in the
universe. There are various methods for searching for WIMPs, one of which is
indirect detection, which involves looking for the Standard Model particles
produced by the decay or self-annihilation of dark matter particles. Within the
mass range of GeV to PeV for the dark matter particle, this type of search can
be conducted by detecting $\gamma$-rays in astrophysical objects with high
concentrations of dark matter. Dwarf galaxies, although not the most dense, are
excellent targets for this type of observation since they are dominated by dark
matter, are relatively close to Earth, and have a low astrophysical background.
In this work, the detectability of dark matter annihilation or decay signals
from dwarf galaxies is predicted using the Southern Wide-field Gamma-ray
Observatory (SWGO), a future $\gamma$-ray observatory that will be built in
South America. This wide field-of-view survey instrument will be able to study
many important dark matter targets in the Southern Hemisphere, and the combined
observation of all targets will provide competitive, if not the best, limits
for dark matter with masses in the range of hundreds of GeV to PeV.
