GLS periodogram for the RVs, residual RVs, window function, FWHM, and bisector span of TOI-6651 are shown in panels 1–5 (top to bottom), respectively. The most significant period in RVs is found to be 5.070 days, denoted by a pink dashed vertical line, which is consistent with the period 5.057 days found in the TESS transit signal. The FAP levels corresponding to 0.1, 1.0, and 10.0% are shown in horizontal blue, orange, and green dashed lines, respectively.