This question came up in the Online 10-day Retreat Nov 3, 2020, guided by Delson Armstrong. Day 4 was part of a daily 30 -minute discussion on the suttas, the Dhamma talk and reflections.
Slightly edited to improve readability
The Mindfulness is a factor present in all states where attention is given. Whenever you are in jhana, the enlightenment Factors are present. Anytime you are distracted, the enlightenment Factors are not present, especially Mindfulness. But Mindfulness is always there, whether you are meditating in a sitting practice, or in daily living. This is why there's the Four Foundations of Mindfulness in everyday living; you are mindful of the body as body; you're mindful of sensations as sensations; you're mindful of mind as mind; and you're mindful of phenomena as phenomena. Every time you use your Mindfulness, you are activating the enlightenment Factor of Mindfulness, which means that you are able to see when a hindrance is arising and quickly let go of it, quickly use the 6R process to let go of it.
When it comes to the other enlightenment Factors that need to be balanced, just know that when you are in the jhana practice, the enlightenment Factors are already present in there.
As you get into deeper levels, you will see that, for example in Neither-perception-nor non-perception, your mind usually tends to slope either towards Sloth&Torpor or Restlessness. These are the two hindrances that are most dealt with, when it comes to the Neither-perception-nor non-perception. You will not see sensual craving in there, you won't see ill will there, you won't see doubt there as a hindrance.
Know this; whenever the hindrances are present, at that point the enlightenment Factors are not present. But as soon as you bring in Mindfulness, you start to bring in the other enlightenment Factors, depending upon which jhana you're in; the level of the jhana that you're at, determines the amount of enlightenment Factors that are present. For example, when you are in the first and second jhana, the enlightenment Factor of Joy and Energy are more prevalent. As you get deeper and deeper, certain other Factors are more prevalent. Once you get into quiet mind, as you're just observing quiet mind, everything has been sort of aligned and balanced, and now smoothly flows. So, those hindrances of sensual craving, the ill will, and the doubt have been completely dealt with, and then, all you're dealing with are the Sloth&Torpor and Restlessness. Whenever you see this happening, know that you're not in jhana. When you use the 6R process, every step of the 6R process is in alignment with one of the enlightenment Factors. So, every time you use the 6R process, you are activating or reactivating the enlightenment Factors. And by doing so you're coming back into jhana.