Sharma (Appl. Math. Comput. 259:741–752) introduced the mixed summation integral-type two-dimensional q–Lupaş–Phillips–Bernstein operators (Formula presented.), wherein he established the rate of approximation by applying Korovkin theorem and studied the weighted approximation properties. The goal of this paper is to establish a Voronovskaja-type theorem and introduce the associated generalized Boolean Sum (GBS) case (Formula presented.) of these operators and study the degree of approximation by the Lipschitz class of Bögel continuous functions and the mixed modulus of smoothness. Furthermore, we show the rate of convergence of the bivariate operators (Formula presented.) and the corresponding GBS operators (Formula presented.) by illustrative graphics and numerical examples using Maple algorithms. © 2017 Taylor & Francis.