It is well-known that CP violation is one of the necessary ingredients to generate the observed matter-antimatter asymmetry of the Universe. Neutral $B$ mesons naturally exhibit CP violating oscillations, such that the amount of CP violation in their mixing can be directly related to the baryon asymmetry through the $B$-mesogenesis mechanism. With this in mind, it is interesting to analyze the extent to which CP is violated in $B$ meson mixing within different scenarios beyond the Standard Model. In particular, we consider: (i) the effects of heavy new physics in the mass mixing following a model-independent approach, (ii) the implications of CKM unitarity deviations with the inclusion of vector-like quarks, and (iii) the role of new contributions to the decay width mixing. The available parameter space for the relevant CP asymmetries is presented, studying their compatibility with the $B$-mesogenesis framework and comparing it with the expected experimental sensitivity for these quantities at LHCb and Belle II.