"Default" option should be the first. See https://youtu.be/Ay28DUrHOB8 for the complaint.
A possibly relevant merge request was started @ https://invent.kde.org/system/dolphin/-/merge_requests/287
Git commit 4585f215a9bdec200ced7dad1820f7248281ada3 by Fushan Wen. Committed on 27/11/2021 at 09:51. Pushed by meven into branch 'master'. Move "Default" option to the front in "Select Remote Charset" menu The ordering of encodings is different from other KDE apps in "Select Remote Charset" menu. We should keep the UI consistency. M +1 -2 src/views/dolphinremoteencoding.cpp https://invent.kde.org/system/dolphin/commit/4585f215a9bdec200ced7dad1820f7248281ada3