Mode frequencies and radial orders n_p for (ℓ, m)=(1, 0) and (ℓ, m)=(2, 0) p modes in the absence of rotation at X_{c, merger}=0.50 for the entropy-sorted (ES), PyMMAMS (PM), and fast accretion (FA) merger product models and their corresponding genuine single-star models. In the top three panels, the colour, line, and marker conventions are the same as in Fig. 7. The bottom panel shows the (ℓ, m)=(1, 0) p mode frequencies for the 3D MHD, entropy-sorted, PyMMAMS, and fast accretion models together.