Would you please explain what you mean by Yogacara idealism? there's more than one way to answer your question.
From the information I've read about Yogachara, it is a "mind-only" form of idealism which some critics say too easily crosses the line from being a "phenomenology" to become the basis for an "ontology".
I was just reading through a paper titled, "Yogacara Buddhism and Sartre's Phenomenology" by Wing-cheuk Chan where he mentions that an idealistic interpretation of Yogacara Buddhism finds its justification in the slogan of the Samdhinirmocana sutra that says, "the object of consciousness is the manifestation of consciousness only
." I might be wrong, but personally, that sounds a bit like Advaita Vedanta to me. Chan goes on to say many Indian scholars simply translate "vijnaptimatrata" or "vijnanavada" as "idealism", and that such an idealistic understanding of Yogacara is still dominant. The Yogacara school is unique in expounding its doctrine of Vijnaptimatra, a term which has been literally translated as "There is no object, there is consciousness only
." Again, to me personally, this sounds like Advaita Vedanta. Is this Vijnaptimatra a dependently originated entity or is it a stainless, unchanging, non-compounded, abstracted thing possessing qualities which validate it as ultimately, substantially and qualitatively real?
I read that according to Yoshifumi Ueda, there was an ontological turn only later in the development of Yogacara. But even Ueda accounts for the possibility of a known object by declaring that, "if there is not objectification of consciousness, there is no object." He even claimed, "To say that the object of consciousness is nothing but consciousness only is to say that consciousness sees itself." At least on first glance, this objectification of consciousness seems to resemble the position of German Idealism, which declares that the world basically results from the self-objectification of spirit. Even if in its early development, Yogacara was primarily epistemological rather than ontological, I'm still scared of it. A.K. Chatterjee has written a book titled, "Yogacara Idealism" in which he argues that Yogacara is not merely an idealism but a synthesis of idealism and absolutism. That's still not comforting.