Radio observations of SN 2019oys with VLA and AMI-LA (see Sect. 2). The left panel shows the broadband spectra obtained with the VLA in this work on four different epochs. The right panel shows the 15.5 GHz light curve obtained with AMI-LA (square markers) and the VLA (circle markers), and a 3 GHz light curve obtained by our VLA (circle markers) and VLASS (diamond marker) observations. The 3σ rms upper limits obtained by the VLA are marked with triangles.