Best TAR model for the mode with k = 0 and m = 1 in TIC 381950897. Top: Lomb-Scargle periodogram (grey curve), detected periods (vertical black lines), and the TAR fit (vertical red lines). Bottom: Period spacings of both the TAR fit (red curve) and the detected periods (black circles). Period spacings of missing modes are omitted in the bottom panel. The dotted line connects periods spacings that stretch across missing modes. The units of the vertical axis AP are kiloseconds (ks) or 10³ s.