If I use "EBGaramond-Initials.otf" instead of "EBGaramondInitials.pfb" in the map file for dvipdfmx, I obtain decorative initials also in the case of dvipdfmx: Good that there's a workaround, but that still indicates a bug in dvipdfmx's type1 handling. (Or, less likely, in the original font generation, I suppose.) k