Time series of the RVs, FWHM, Δ T_{4000 K}, and TESS binned photometry (sector 66 and 67) of TOI-4342 after correction for the inferred offsets. The measurements are shown as white dots with error bars that include the fit jitter. In the top panel, the full RV + activity model with its 1 σ uncertainty is shown in blue, while the GP-only component is shown in brown. In the three other panels, the activity models are displayed in green, pink, and purple, with their associated shaded uncertainties.