This is inconsistent with your other statements. By our own admission, the false selves do not find liberation. Therefore,
1. Please explain how this one true self is finding enlightenment again and again? Once for Yajnavalkya, once for Shankara, etc.,?
Enlightenment is just the understanding that the ego or false self is a delusion. There is no one who is getting enlightened. Brahman or the Self is always present, while the false self obscures it. The dissolution of the false self or false 'I' unveiled the Self, for both Yajnavalkya and Shankara. It is just the dissolution of the false selves taking place, nothing else.
2. When you talk about newly revealed awareness and bliss, who is this for?
Please be specific.
As stated earlier, the Self or awareness exists at all times, though it is usually veiled by the mental-emotional patterns of thoughts and emotions, arising out of belief structures that constitute the ego or false self. With the dissolution of the false self, the Self is revealed with its bliss. So simple.
However, mere intellectual understanding, as I explained earlier, is bound to result in imaginary delusion. It is in meditation that one confronts this fact clearly.
I explained clearly, that in your model, there is someone/something that finds enlightenment. That is not the false self and it also not Brahman. So what is it? That is the third entity, the true self that you have talked about several times and there have to be many of them. If there was only one true self, it found liberation a long time ago with Yajnavalkya and no one else needs to get liberated. Because the false selves are not the ones to find liberation (they are illusory)
As explained earlier, there is no one who finds enlightenment, as the false self is false and an illusory entity which veils Brahman or Self. Brahman is the true self or Self, and there is no third entity.
If there was only one true self, it found liberation a long time ago with Yajnavalkya and no one else needs to get liberated. Because the false selves are not the ones to find liberation (they are illusory)
As stated earlier, liberation or enlightenment is the dissolution of the false self. There is no one who attains enlightenment. Enlightenment is just the unveiling of the Self within, that is all.
In Yajnavalkya, enlightenment happened when the false self that he had identified as his mind-body complex and its secondary associations, dissolved.
Similarly too in Shankaracharya , where his false self dissolved into nothing. This revealed the omnipresent Self or pure consciousness within as the true 'I'.
Jewelry is both Jewelry and Gold. This is bhedabheda and not advaita. If you want to apply this analogy to advaita, then you are claiming that the Jewelry is unreal; an illusion.
At the absolute level jewelry is just gold. Its names and forms are irrevalent.
In the relative level they are relevant, as a gold chain for a child will not fit an adult and so on.
The earliest known commentator for bhedabheda is Bhartrprapancha (5th Century CE). Please look up his parinama vaada and how Shankara severely criticized it in his Brhadaranyaka bhashya and also in his BSB. I can look up specific quote numbers, if you need.
Bhedabheda deals with a relative aspect of reality or existence. It is not the ultimate truth or reality, and that may be why Shankara criticised it.
The bhedabheda states that the individual self (jivatma) is different and not different from the ultimate reality Brahman.
This could be a reference to temporary forms of samadhi or nondual perception like nirvitarka samadhi or nirvichara samadhi or kevala nirvikalpa samadhi, where the false self or 'I' returns due to the unburnt vasanas or samskaras within and veils the Self again, when the samadhi comes to an end.
While enlightened sages dwell in constant nondual perception, the saints come in and out of samadhi. They can be referred to being established in bhedabheda.