As pointed out by @jasonaebischerGIT, the shifts in the Fermi constant (due to NP in the mu->enunu transition) are currently only taken into account for tau->lnunu and tau->Pnu decays. While they are negligible in essentially all FCNC decays, they can be relevant in K->lnu, pi->lnu, and K->pilnu.
As pointed out by @jasonaebischerGIT, the shifts in the Fermi constant (due to NP in the
mu->enunutransition) are currently only taken into account fortau->lnunuandtau->Pnudecays. While they are negligible in essentially all FCNC decays, they can be relevant inK->lnu,pi->lnu, andK->pilnu.