I don't know of any person called Engles who would be significant in this context, so I can't tell you if there is one you should know about. The Engels who said what you quoted above, also said - literally in the sentence preceding your quote:
Why do the anti-authoritarians not confine themselves to crying out against political authority, the state? All Socialists are agreed that the political state, and with it political authority, will disappear as a result of the coming social revolution, that is, that public functions will lose their political character and will be transformed into the simple administrative functions of watching over the true interests of society.
As always, context matters. And I'll trust the context created by the words and interpretations of respected historians way more than I'll trust some randos on Lemmy who only excel at selective quoting.