Allow start panel (or end panel) to remain open on wider screens

[dadino]

I'm using this library to adapt a tablet layout that is split in 2 sections. It is now a ConstraintLayout, divided by a vertical guideline.
On phone I'd like to have the left section in the start panel and the right section in the center panel. I'd like to use Overlapping Panels on the tablet layout too, replacing the ContraintLayout+Guideline and locking the start panel open, without the center panel going offscreen (basically, adapt its width to width of screen - start panel width). It should also avoid the alpha thing on the center panel.
Is this currently possible?