It might be helpful to remember that there are different ways of developing samādhi that supports insight, not all of which entail jhāna. AN 4.41 speaks to this, describing four ways of developing samādhi.
Bhikkhus, there are these four developments of concentration. What four? (1) There is a development of concentration that leads to dwelling happily in this very life. (2) There is a development of concentration that leads to obtaining knowledge and vision. (3) There is a development of concentration that leads to mindfulness and clear comprehension. (4) There is a development of concentration that leads to the destruction of the taints.
(1) "And what, bhikkhus, is the development of concentration that leads to dwelling happily in this very life? Here, secluded from sensual pleasures, secluded from unwholesome states, a bhikkhu enters and dwells in the first jhana, which consists of rapture and pleasure b om of seclusion, accompanied by thought and examination. With the subsiding of thought and examination, he enters and dwells in the second jhana, which has internal placidity and unification of mind and consists of rapture and pleasure born of concentration, without thought and examination. With the fading away as well of rapture, he dwells equanimous and, mindful and clearly comprehending, he experiences pleasure with the body; he enters and dwells in the third jhana of which the noble ones declare: "He is equanimous, mindful, one who dwells happily.’ With the abandoning of pleasure and pain, and with the previous passing away of joy and dejection, he enters and dwells in the fourth jhana, neither painful nor pleasant, which has purification of mindfulness by equanimity. This is called the development of concentration that leads to dwelling happily in this very life.
(2) "And what is the development of concentration that leads to obtaining knowledge and vision? Here, a bhikkhu attends to the perception of light; he focuses on the perception of day thus: 'As by day, so at night; as at night, so by day.’ Thus, with a mind that is open and uncovered, he develops a mind imbued with luminosity. This is the development of concentration that leads to obtaining knowledge and vision.
(3) "And what is the development of concentration that leads to mindfulness and clear comprehension? Here, a bhikkhu knows feelings as they arise, as they remain present, as they disappear; he knows perceptions as they arise, as they remain present, as they disappear; he knows thoughts as they arise, as they remain present, as they disappear. This is the development of concentration that leads to mindfulness and clear comprehension.
(4) "And what is the development of concentration that leads to the destruction of the taints? Here, a bhikkhu dwells contemplating arising and vanishing in the five aggregates subject to clinging: ‘Such is form, such its origin, such its passing away; such is feeling … such is perception … such are volitional activities … such is consciousness, such its origin, such its passing away.’ This is the development of concentration that leads to the destruction of the taints.