Asymmetries of 33 rotationally split multiplets δ_A against their central frequency f₀ colour-coded by the projected surface rotation rate. The square symbols mark stars with measured photometric surface rotation rates (f_rot). The symbols connected by a line belong to the same (l = 2) multiplet. The black outlines indicate stars where the Gaia frequencies do not match the TESS frequencies within our threshold. The measurement uncertainties are within the symbol sizes.