  Current tensions in cosmology, including $H_0$ and $\sigma_8$, provide one of
the strong reasons to suspect the existence of physics beyond the standard
model of cosmology ($\Lambda$CDM). In this paper, we investigate if there is a
relation between these tensions and beyond cold dark matter scenarios. To model
non-CDM, we assume a decaying dark matter (DDM) which is unstable and may decay
into two daughter particles, a combination of cold dark matter, warm dark
matter, and dark radiation, to explore a vast era of possibilities. We checked
our model against CMB data and could show that decaying dark matter seems not a
promising candidate to address the cosmological tensions.
