Allegedly, on or about 26 December 2017, Patrick O'Callaghan sent:
There is an ongoing project to unify Gnome and KDE password managers. See https://www.freedesktop.org/wiki/Specifications/secret-storage-spec/
It's been ongoing for quite a few years and hasn't produced anything usable so far.
I wonder if that's down to technical problems, or obstinacy?