Resulting distribution of RM_model values given by Eq. (3), estimated by combining contributions from each environment along the FRB sight line (see Section 3 and Figure 3 for details). The vertical dashed magenta line illustrates the value of the RM_obs for FRB 20211212A, while the horizontal magenta dotted line shows the value of the corresponding log-likelihood value (logℒ_FRB = −6.41) evaluated from the KDE fit to the RM_model distribution at the value of RM_obs, given the combination of model parameters Θ (see discussion in Section 4 for more details).