When editing a document in List View, the dropdown for change the Type of the field is only visible in Light Mode when hover. (In Dark Mode the background color and text are white)
Select any collection and select any document to edit. When editing, click and hover the Field Types.
The background or the text color in Dark Mode must changes to be readable in that theme.
The text and background of the Select TypeEditor Component are white in Dark Mode, so you can't read the content.