Things merely labelled DE do not have ta’am chalav. Does anyone seriously have a safek whether or not that is accurate? So basically; you have a safek if it was hot, a safek if it was a ben yomo, a safek if it was a davar hapogem, and to top it all off you know there is no ta’am chalav regardless.
I assume since it has a “D”, that is must be made in milchig keilim which are ben yomo.
Dunno why you’d assume that.