Hi, my humble solution is as below:

Hope the devuan_chimaera_4.0.0_amd64_desktop.iso_kde_plasma version will fix the problem.

I searched the key word: kde plasma does not dispaly root file, found out someone had the similar problem:

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Dolphin doesn’t show Root and Home partitions
https://forum.manjaro.org/t/dolphin-doe … ions/72402

In Dolphin, press F9 to show the Places sidebar (if it’s not already visible). Right-click the title (“Places”) of that section and choose “Show Hidden Places” from the popup menu.

You probably accidentally marked those partitions as “hidden”. Once they are visible again, you can right-click them and permanently un-hide them.
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I tried dolphin and solved the problem:

Dolphin->top right(show menu)->configure dolphin->Startup->show on start up->choose ( /bin)->apply->

Dolphin(again)->will display Custom Path >bin  ->click Custom Path->right click ->choose (Add to places)-> Custom Path will change to file->right click file and edit->

label: Root; choose an icon: folder-root-symbolic- >OK.

Dolphin return to normal:
-> Dolphin->top right(show menu)->configure dolphin->Startup->show on start up->choose (Folders, tabs, and window state from last time)->apply.
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Thanks!