On the role of soft and non-perturbative gluons in collinear parton densities and parton shower event generatorsM. Mendizabal, F. Guzman, H. Jung and S. Taheri MonfaredEur. Phys. J. C, 84 12 (2024) 1299DOI: https://doi.org/10.1140/epjc/s10052-024-13657-x