I would like to start by quoting this answer's summary of the divine hiddenness argument:
This is the crux of the atheistic Argument from Divine Hiddenness:
(1) Necessarily, if God exists, then God perfectly loves such finite persons as there may be.
(2) Necessarily, if God perfectly loves such finite persons as there may be, then, for any capable finite person S and time t, God is at t open to being in a positively meaningful and reciprocal conscious relationship with S at t.
(3) Necessarily, if for any capable finite person S and time t, God is at t open to being in a positively meaningful and reciprocal conscious relationship with S at t, then, for any capable finite person S and time t, it is not the case that S is at t nonresistantly in a state of nonbelief in relation to the proposition that God exists.
(4) There is at least one capable finite person S and time t such that S is or was at t nonresistantly in a state of nonbelief in relation to the proposition that God exists.
(5) So, it is not the case that God exists. (from 1 through 4)
(Source: Howard-Snyder, Daniel and Adam Green, "Hiddenness of God", The Stanford Encyclopedia of Philosophy (Fall 2022 Edition), Edward N. Zalta & Uri Nodelman (eds.), URL = https://plato.stanford.edu/archives/fall2022/entries/divine-hiddenness/.)
I find the phrase "positively meaningful and reciprocal conscious relationship" interesting, but at the same time quite vague and ambiguous. What exactly would count as God stepping out of his hiddenness in order to meet the implicit expectations of this phrase? Are there any specific manifestations or interventions a God would have to perform for a "positively meaningful and reciprocal conscious relationship" to exist? Would it be okay if this "relationship" only takes place in private settings? Or is there an implicit requirement that this "relationship" produce publicly accessible scientific evidence that could be externally validated/corroborated?
In short, what are the specific requirements that any "positively meaningful and reciprocal conscious relationship" between a human being and a God must satisfy to be regarded as real?