I came upon this passage in Ajahn Analayos book ‘Satipatthana; A Practice Guide’, which made me think of this topic.
"Absorption itself appears to have been already known in the ancient Indian setting before the time of the Buddha (Anālayo 2017a: 163ff). The distinct contribution by the Buddha seems to have been the perspective that such experiences are merely the product of specific conditions. This divests altered states of consciousness of any metaphysical or ontological connotations. The Buddha’s approach in this respect appears to have evolved from an analysis of absorption into three types to the more commonly found analysis into four types (Anālayo 2017c: 36ff). The existence of these two alternative schemes itself already shows that there is not just one possible mode of reckoning. What both schemes have in common is the analytical approach, the emphasis on conditionality. With the arising of such and such mental factors, such and such a type of concentrative experience can manifest. I take it that this perspective could be the backdrop of the often-found definition of right concentration by way of the detailed description of the four absorptions, reflecting the analytical approach and the vision of conditionality to be applied to these sublime experiences.” Pg 179
I hope you find this of some use or interest 