I would be careful with that one. 'Dark Energy' has been in this weird grey area for a while now, where we have this observation that the expansion of the universe is accelerating, but we have no explanation. There have been a lot of hypothetical explanations. Seems like Quintessence is just one of them.

Recently there has been growing doubt that expansion of the universe is accelerating at all, favoring that it's constant. That would completely undermine this Quintessence thing.

https://phys.org/news/2020-01-evidence-key-assumption-discov...