The Account of Other Minds in Chinese Yogācāra Buddhism
Didn't you already ask this?

&quot;Or does he pretend to communicate with other minds, but in fact he
knows that only his mind exists, and all other minds are just
imaginations created by his mind&quot;

Who's conceptual framework would that be done with?
What do you think minds are, things with an unchanging essence?
As I see it, key to understanding the 'mind-only' perspective is recognising all experiences have to be filtered through subjectivities, there is no truly objective, because no one experiences that, only consilience of experiences: like between different senses, &amp; by comparing with others.
We each carry our own reality, but it's one where we constantly interact with the reality of others. A modern framing is 'peer to peer reality'.