Stacked representation of the extracted independent, significant TESS frequencies for 212 of the Gaia-detected β Cep stars, sorted by the TESS frequency with the largest amplitude. The colour-scale indicates the amplitude of each detected signal on a logarithmic scale. This figure includes only the stars whose main frequency occurs in the plotted β Cep range. Three stars have lower main frequencies and turn out to be SPB stars or β Cep and SPB hybrid pulsators with dominant high-order g-modes, or are dominated by other variability than pulsations.