of a massive source and contains a rich phenomenology, which makes it particularly attractive. Another popular class of screening consists of the chameleons [@PhysRevD.69.044026; @PhysRevLett.93.171104], where in regions of high potential the scalar fields become massive and cannot propagate, resulting thus in suppression of the fifth forces. Despite the fact that chameleons cannot produce self-acceleration [@Wang:2012kj], their very interesting phenomenology makes them serve as ideal testbeds for gravity and considerable efforts have been put into their study in the past decade [@Burrage:2017qrf]. Other screening classes include the symmetrons [@PhysRevLett.104.231301; @Olive:2007aj], that employ spontaneous symmetry breaking and share qualitative similarities with the chameleons and the K-Mouflage [@Dvali:2010jz; @Babichev:2013usa], in which deviations are suppressed when scalar field gradients exceed a certain value.

The observed inhomogeneous LSS of the Universe, is the outcome of the subsequent nonlinear gravitational evolution of the primordial density fluctuations, partially modulated by the late-time acceleration. As a result, it provides us with an observational window into the fundamental physics that shaped this process, including sensitive tests of the underlying large-scale gravitational law, making it particularly valuable for constraining the various MG models. Indeed, as we are entering the era of “precision cosmology", multiple spectroscopic and photometric surveys of 