Do we have any ways to change default sorting to alphabetic order for folders that rendered using ECL for Media Manager in CMS explorer.
One would indeed expect the ordering to be (alphabetical) similar to that of the CME, but as @Marko mentions, the order is coming from the external system. That is basically how ECL works.
In an ECL connector, you implement the
IContentLibraryContext interface, and there you will have to implement the
GetFolderContent(IEclUri parentFolderUri, int pageIndex, EclItemTypes itemTypes) method. That simply returns the contents of the folder, which contains a list of items (
List<IContentLibraryListItem>). So technically if you would want to sort the items which you had gotten from the external system, you can implement that in an ECL provider.
However since the Media Manager connector is not an open source ECL provider, there is nothing you can do to change this behaviour.