Analysis of the Saio et al. (2021) sample, complemented by Li et al. (2020) analysis. Left panel: minimum, mean, and maximum period-spacing pattern for the 16 stars analysed by Saio et al. (2021) (KIC numbers as the y-axis). Right panel: number of modes in the related period-spacing patterns, and extent in radial order. We note that all period-spacing patterns are taken from Li et al. (2020) related catalog, although Saio et al. (2021) used the period-spacing pattern of Van Reeth et al. (2016) for KIC12066947.