RG's menu doesn't recognize numerous journals for unfathomable reasons. That's why some folks resort to the workaround of including publication details with the title.
Yes, it is true, as of July 1, 2024 the "Quaderni di Storia della Fisica" merged with "The European Physical Journal H - Historical Perspectives on Contemporary Physics" (EPJ H).
However, I emphasize, from 1997 to June 30, 2024, the "Quaderni di Storia della Fisica" were printed by SIF, and for every article published in it from 1997 to June 30, 2024, it is not possible to indicate the name of the journal because for Researchegate this journal never existed. Why? You cannot include it ?
And whether or not open access is possible has no bearing on the fact that ResearchGate does not acknowledge that this journal existed for 27 years (1997-2024).