In ΛCDM the cosmological redshift drift is predicted to be an almost perfectly isotropic signal that depends only on redshift, yet detailed studies show that local accelerations of the Solar System, bulk flows, inhomogeneities, and large-scale structure can imprint dipolar and higher-order anisotropies in the observable drift at a level comparable to or larger than the tiny FRW signal itself (Linder 2008; Zhang & Li 2020). This means that any measured direction-dependent pattern in redshift drift can be produced either by genuine anisotropy in the background expansion or by a complex superposition of local and large-scale peculiar accelerations, making it very challenging for ΛCDM to use the Sandage–Loeb test as a clean, model-independent probe of isotropic dark-energy–driven acceleration (Quercellini et al. 2010; Codur & Marinoni 2021).