Is it possible to add a third app to split view?
Magnet for macOS has builtin keyboard shortcuts for resizing a window to left third, centre, or right third of the screen, left and right halves, and any of the four quarters in the corners of the screen. Makes realigning windows pretty simple. Can of course use the second desktop functionality in macOS along with this too. BetterSnapTool is similar but I don't think it can do thirds.