Most of those really nice experiences of strong, flowing, rapid, clear, effortless mindfulness are the A&P stage in some way: very common, very nice.
Equanimity is important, but investigation and honesty are more important. Higher levels of true, full-spectrum, wide, deep Equanimity come naturally sometimes from really well-done investigation and honesty much more often than by focusing on trying to be equanimous, which most of the time is actually some sort of enforced and somewhat dishonest passivity, tolerance, flatness, indifference, immitation of Equanimity, etc. Something to watch out for. Better to just notice every little sensation arise and vanish regardless of what it was rather than have too much of an adgenda for them, which attempting to be Equanimous is.
While opinions on Teal Swan vary, the point she made in this particular
video to which my mom just sent me the link is useful in this context. It is the only video of hers I have watched, and I don't know much else about her, but the point about noticing really honestly and openly what suffering there is and what reactions to your emotions you are honestly having will serve you better in the long-run from a pure Vipassana point of view than by trying to be ok with everything: subte but important difference.