Multiple windows each with multiple tabs

I’m trying to use okular to view two sets of files (graphs of type A and graphs of type B) with each set in a separate window.

Currently, I open the A graphs using okular *graphs_A.pdf within one window, each graph with their own tab. Yay! However, if I try to do the same with B graphs (okular *graphs_B.pdf), they get added to the window with graphs A. Boo.

Is there a straight forward way to do this? If not is there a different pdf viewer that would work for this. In my experience neither evince nor atril support tabs.