Flutter large screen Master-Detail UI like Android Settings

Question

I'd like to optimize my Flutter app for large screens (tablets, foldables, desktops), with a navigation flow like the one of the stock Android Settings. I'm becoming crazy as I tried almost every possibility that came to my mind and lost one month without getting the desired result.

On a small screen device the navigation flow should be classic, with screens apprearing one above the other, with a back button for popping them from the navigation stack.

On a large screen device the master and details page should be placed side by side. All sub-screens should open in the detail area, and the main sub-screen should not have a back button.

When a foldable device gets opened if user had navigated to a sub-screen that sub-screen should display in the detail area.

When a foldable device gets closed if user had navigated to a sub-screen that sub-screen should displayed at the top of the navigation stack.

Things that are driving me crazy:

• back button management with multiple navigator
• deciding what stack should be shown when a foldable device gets opened or closed

Any idea?