Several phenomena predicted by theories beyond the Standard Model manifest as modifications
in the neutrino oscillation pattern. Large-volume Cherenkov detectors are able to observe atmospheric and cosmic neutrinos over a broad range of energies and baselines, making them powerful
instruments for probing a variety of beyond Standard Model effects. KM3NeT is an infrastructure of two water Cherenkov detectors currently under construction in the Mediterranean Sea.
The KM3NeT/ORCA detector is optimized for the precise measurement of atmospheric neutrino
oscillation parameters at GeV energies, whereas KM3NeT/ARCA aims at the observation of
high-energy astrophysical neutrinos. This contribution summarizes the results of several beyond
Standard Model searches conducted with data from the partially deployed ORCA detector. Furthermore, future plans for exploring new physics effects at high energies with ARCA are discussed
