  The discovery of superconductivity in infinite-layer nickelates has added a
new family of materials to the fascinating growing class of unconventional
superconductors. By incorporating the strongly correlated multi-orbital nature
of the low-energy electronic degrees of freedom, we compute the leading
superconducting instability from magnetic fluctuations relevant for
infinite-layer nickelates. Specifically, by properly including the doping
dependence of the Ni $d_{x^2-y^2}$ and $d_{z^2}$ orbitals as well as the
self-doping band, we uncover a transition from $d$-wave pairing symmetry to
nodal $s_\pm$ superconductivity, driven by strong fluctuations in the
$d_{z^2}$-dominated orbital states. We discuss the properties of the resulting
superconducting condensates in light of recent tunneling and penetration depth
experiments probing the detailed superconducting gap structure of these
materials.
