Mean values and errors of the parameter ξ presented for the ξCDM and wξCDM models across the three SNeIa datasets. In most cases, the interaction term agrees with ξ = 0 within 1σ. The left panel illustrates the results under a uniform prior on the matter density Ω_m, 0 ∈ [0, 1], while the right panel assumes a Gaussian prior on Ω_m, 0 centered around the value obtained from Table 3 of Anchordoqui et al. (2021): ${\mathrm{\Omega }}_{\mathrm{m},0}^{\mathrm{CMB}}=0.139\pm 0.095$, derived from an imposed IDE model.