  We review the recent efforts in the NNPDF Collaboration towards a new global
extraction of polarized parton distributions functions (pPDF). Polarized PDFs
are highly relevant for the interpretation of current and future polarized
high-energy experiments, including the upcoming Electron-Ion Collider (EIC). We
present a recent study of the role played by heavy quark effects in polarized
DIS, where we apply the FONLL general-mass variable-flavour-number scheme for
the first time in a polarized setup and demonstrate the significant impact of
charm mass corrections, specifically for the polarized gluon distribution. We
show preliminary results (DIS-only) of this new pPDF release, NNPDFpol2.0,
based on the NNPDF4.0 fitting machinery and the associated new theory
prediction pipeline.
