You're welcome to make of Indian writings what you will, but i think it's now been conclusively demonstrated that that what you proposed as the inspiration for Platos model of Atlantis has shown to be outside of the capabilities and interest of Plato himself, and that his actual premise was the Geocentric cosmological model and principle of sevenfold harmonic division.
Can you please supply a ref for this as it does not appear to gel with what I have here unless I have missed something. It is the chain element that interests me in particular.
Plato does not appear to show any interest in eastern material I agree but note the word 'appear' he may have utilised this story as I suggested and if he came across it in Egypt may have assumed it was Egyptian. The tale itself may well have been known by some in Egypt as there was a continual trade with India and for a time their rulers were related to the Mitanni who had very distinctive Indic associations. So the possibility cannot be ruled out.
There isn't any justification for considering Indian origins for a tale involving the rise and fall of former civilizations of the Western Mediteranean and beyond.
We do not have an analysis of the Atlantis tale that fits all the criterion of place and date etc. Despite searches all over the place it has not been found hence I think we can agree that at least part of it is allegory...but allegory for what and which parts are allegory.
It's allegorical and in a sense a proposed model for the survival and continuance of Greek and Egyptian civilization taking into account they would have observed the ruins of former megalithic cultures.