Total Commander

LG recently made some phones (V50, V60, G8X) that you can extend with a secondary display and view them side-by-side.
Total Commander is a perfect example where this dual-screen setup could be useful.
However the app needs to support this "wide-view" feature, otherwise it can only be displayed on one of the screens.
Additionaly the line separating the two file-panes has to be exactly in the middle to align with the boundaries of each screen.

Are there any apps in the play store which support this feature? This would allow me to look at the manifest file to check how this is implemented.

I don't have LG smartphone, but if by "Dual-Screen support" the so-called multi window feature is meant, here I posted a link to a post with a snippet from manifest for adding Multi-window support for LG and Samsung phones.

Thanks for the link!

2HuBa
Do you have such a phone?