We investigate the cosmological dynamics of a modified gravity theory described by Formula: see text, where Formula: see text, Formula: see text, Formula: see text, Formula: see text, Formula: see text and Formula: see text are the free parameters. By introducing appropriate dimensionless variables, the field equations are reformulated as an autonomous system of ordinary differential equations, enabling a dynamical systems analysis. We identify eight critical points and examine their stability, then we determine the conditions under which a late-time accelerated expansion arises as a stable attractor. For our model, we obtain Formula: see text stable attractors. The model yields a transition redshift at Formula: see text, present-day deceleration parameter Formula: see text, and equation of state parameter Formula: see text, which are all consistent with current observational bounds. The evolution of density parameters as a function of Formula: see text indicates a Universe presently dominated by dark energy. Additional diagnostics, including the state finder parameters, are employed to characterise the cosmic phases corresponding to the critical points. Finally, a combined analysis using 77 Hubble, 15 BAO, and 1048 Pantheon data demonstrates that the model closely reproduces the behaviour of the Formula: see textCDM paradigm.
Meetei et al. (Fri,) studied this question.