New a project, create a grouped multiple-lines plot.
In PD dlg, set Edit Mode to Independent.
Go to Line tab of the first line, check Enable Fill Area Under Curve. ? notice that the Pattern tab shows.
Select other curve on the left, ==> the Pattern tab doesn’t show.
Uncheck for example the “Follow 1st Plot in the Group“ checkbox. ? The Pattern tab shows.
Fixed in Origin2024b.