I have tried restoring Dolphin 25.04.3 named files on Debian
~/.config/dolphinrc
~/.local/state/dolphinstaterc
~/.local/share/dolphin
at the time when the Dolphin was not running. I did it because I have accidentally opened Dolphin when my ext. drive was not mounted and then did not remount and hit back button in all affected tabs in order to recover the state. As a result, the affected tabs got reset to the ext. drive root mount directory and I forgot what was the path i had previously opened.
But despite restore of mentioned files/folders (at least i hope that it has been restored correctly), for some reason, it does not open with the tabs i had open at the date when my backup was made, but with current tabs. I do not know why. Is there any other Dolphin config. file or folder?
I have to save current tabs as bookmarks more often I guess.