This study investigates how polarization forces (PF) and non-Maxwellian electrons affect dust acoustic waves (DAWs) in a complex plasma containing positively charged dust grains, regularized-distributed (RKD) electrons (with spectral index \(\kappa \) and cutoff parameter \(\alpha \) ), and Maxwellian ions. Using reductive perturbation methods, we derive and solve Kadomtsev-Petviashvili (KP)-type equations (including modified KP [mKP] and coupled KP [CKP] forms) to quantify nonlinear wave behavior. Key results show that PF parameter R critically modulates DAW polarity, positive KP soliton amplitudes decrease by 0.25 as R increases \((0.00115\rightarrow 0.00119)\) , while negative solitons grow by 0.4. RKD electrons introduce threshold effects (e.g., KP solitons vanish at \(\alpha _{c} = 0.492\) for \(\kappa =0.5\) ). These findings, validated analytically and numerically, provide predictive scaling laws for DAWs in mesospheric plasmas, with direct implications for interpreting spacecraft data and laboratory plasma experiments.
