Well, I think I may have answered my own question.
When managing preset lists it appears that you see every preset in every list as a source preset that can be dragged into the current list being edited.
By clicking on the magical “View” buttons, you can eventually get to a vieew in Preset List Edit mode that lists every preset by title instead of grouping them by algortihm.
This seems a bit more convoluted than FactorLib was but I suppose much of it is driven by the somewhat limited UI options on a tablet.
