Extending Recent Congruence Results on $(\mathrm{\ell },\mu )$-Regular Overpartitions

Recently, Alanazi, Munagi, and Saikia employed the theory of modular forms to investigate the arithmetic properties of the function $\overline{R_{\mathrm{\ell },\mu }}(n)$, which enumerates the overpartitions of $n$ where no part is divisible by either $\mathrm{\ell }$ or $\mu$, for various integer pairs $(\mathrm{\ell },\mu )$. In this paper, we substantially extend several of their results and establish infinitely many families of new congruences. Our proofs are entirely elementary, relying solely on classical $q$-series manipulations and dissection formulas.