For this I think they (those part of EBT which do believe Jhāna is Jhāna lite) are in essence agreeing with the dry insight path recognized by classical theravada, but also taking into account MN64.
There is a path and a practice for giving up the five lower fetters. It’s not possible to know or see or give up the five lower fetters without relying on that path and that practice. Suppose there was a large tree standing with heartwood. It’s not possible to cut out the heartwood without having cut through the bark and the softwood. In the same way, there is a path and a practice for giving up the five lower fetters. It’s not possible to know or see or give up the five lower fetters without relying on that path and that practice.
And what, Ānanda, is the path and the practice for giving up the five lower fetters? It’s when a mendicant—due to the seclusion from attachments, the giving up of unskillful qualities, and the complete settling of physical discomforts—quite secluded from sensual pleasures, secluded from unskillful qualities, enters and remains in the first absorption, which has the rapture and bliss born of seclusion, while placing the mind and keeping it connected. They contemplate the phenomena there—included in form, feeling, perception, choices, and consciousness—as impermanent, as suffering, as diseased, as a boil, as a dart, as misery, as an affliction, as alien, as falling apart, as empty, as not-self. They turn their mind away from those things, and apply it to the element free of death: ‘This is peaceful; this is sublime—that is, the stilling of all activities, the letting go of all attachments, the ending of craving, fading away, cessation, extinguishment.’ Abiding in that they attain the ending of defilements. If they don’t attain the ending of defilements, with the ending of the five lower fetters they’re reborn spontaneously, because of their passion and love for that meditation. They are extinguished there, and are not liable to return from that world. This is the path and the practice for giving up the five lower fetters.
Jhānas are required for non-returner onwards at the lastest. The dry insight of classical theravada if I am not wrong says access concentration can go all the way right?
So to not ignore MN64, they map access concentration to sutta Jhāna (there’s possibly different mappings by different teachers).
Only the EBT group who believes in Ajahn Brahm (most of sutta central monastics), take Jhāna to be deep and required for non-returner onwards.