Help Native File Picker could not get Android root

[David Chang]

When I use Pixel 2 (Android 11) open the native file picker, I can find the phone model and get the root folder. (Like Picture 1)
But as I use Samsung S8 (Android 7), I only see the image, video , recent folder, download folder. (Like Picture 2)

Does anyone know how to fixed it?

 

[Dannydet]

Install a file explorer that lets you show root

 

[svim]

Keep in mind you're trying to do a one-to-one comparison of two very different phones (different models from different manufacturers running different versions of the Android operating system). Both phones are running Android but the changes from 7 to 11 are not just for superficial user interface matters, there's also been a lot of evolving changes in the basic file structure running at a system-level underneath (or 'devolving' depending on your viewpoint).
Regarding '...native file picker' you might instead want to install the same file manager app on both phones so you can at least be using the same visual process to view your files/folders. i'll suggest trying the Ghost Commander app, it's Open Source and no ads but most importantly for this particular situation it's a file manager this already includes Storage Access Framework support, which might be helpful in viewing otherwise restricted directories (...note there's distinction between being to at least view the contents of some folders but, unless you root your device, be able to also edit/alter/delete).
SAF
https://developer.android.com/training/data-storage/shared/documents-files
Ghost Commander
https://play.google.com/store/apps/details?id=com.ghostsq.commander&hl=en_US&gl=US
or
https://www.apkmirror.com/apk/ghost-squared/ghost-commander-file-manager/