Supersymmetric theories with non-minimal field content can accommodate light scalar(s), pseudoscalar(s) and neutralino(s) in certain regions of the parameter space. These states, through their presence in the decay cascades of the heavier particles can lead to novel signatures at the LHC. This conclusion is not only limited to the supersymmetric particles but also extended for the heavy standard model particles. We emphasise how the presence of these states produces distinct final states at the LHC. Analyses of these kinds with heavy standard model particles (e.g., W±, Z, Higgs) are viable alternatives to verify evidence of new physics beyond the standard model when the rest of the mass spectrum remains beyond the reach of the LHC, following the trend of missing excess over the standard model prediction as of now. We exemplify our analysis with the standard scale invariant NMSSM and the μνSSM, where three families of the right-handed neutrino superfields have been used to offer a solution to the μ-problem and at the same time to house the observed three flavour neutrino data.