What is the “dimension of the infinitude of consciousness” if consciousness is dependently originated? Is there a consciousness apart from aggregates?

In the Nikāyas, consciousness is often described as a dependently originated phenomenon. It arises in dependence on conditions such as nāma-rūpa and the sense bases. For instance - > "Just as fire is classified simply by whatever requisite condition in > dependence on which it burns — a fire that burns in dependence on wood > is classified simply as a wood-fire, a fire that burns in dependence > on wood-chips is classified simply as a wood-chip-fire; a fire that > burns in dependence on grass is classified simply as a grass-fire; a > fire that burns in dependence on cow-dung is classified simply as a > cow-dung-fire; a fire that burns in dependence on chaff is classified > simply as a chaff-fire; a fire that burns in dependence on rubbish is > classified simply as a rubbish-fire — in the same way, consciousness > is classified simply by the requisite condition in dependence on which > it arises. Consciousness that arises in dependence on the eye & forms > is classified simply as eye-consciousness. Consciousness that arises > in dependence on the ear & sounds is classified simply as > ear-consciousness. Consciousness that arises in dependence on the nose > & aromas is classified simply as nose-consciousness. Consciousness > that arises in dependence on the tongue & flavors is classified simply > as tongue-consciousness. Consciousness that arises in dependence on > the body & tactile sensations is classified simply as > body-consciousness. Consciousness that arises in dependence on the > intellect & ideas is classified simply as intellect-consciousness." ~ MN 38 However, in DN 15 and many other suttas in descriptions of the formless attainments, the Buddha also speaks of a “dimension of the infinitude of consciousness”, which one enters after the dimension of infinite space. > “Having completely surmounted the base of the infinity of space, > (contemplating) ‘Consciousness is infinite,’ one enters and dwells in > the base of the infinity of consciousness. This is the fifth > emancipation. > > “Having completely surmounted the base of the infinity of > consciousness, (contemplating) ‘There is nothing,’ one enters and > dwells in the base of nothingness. This is the sixth emancipation. Given the standard teaching that consciousness does not exist apart from conditions:- If consciousness is entirely conditioned and dependent, how should we understand this “dimension of the infinitude of consciousness”? what does it mean to speak of a dimension of its infinitude? Does it come under the intellect-consciousness of MN 38 Or is it something different? Who or what is the one who “enters” these dimensions one after another? is it simply the stream of consciousness, or is there an implied experiencer with continuity beyond the aggregates? ---------- I am seeking canonical, commentarial, or scholarly interpretations that reconcile DN 15’s description of the “dimension of the infinitude of consciousness” with the early Buddhist principle of dependent origination. Is this dimension to be understood phenomenologically, as part of meditative experience, or does it suggest a more nuanced conception of consciousness that is distinct from the aggregates?