Bro, not it freaking wasn't. Enies Lobby had already aired in 2007. There was a boost in sales at the time, but it wasn't anywhere near the highs that were reached during 2010 and 2011, where the anime was in Impel Down and Marineford, and the manga was in Marineford and Fishman.
Literally, just look it up on the wiki.
https://onepiece.fandom.com/wiki/Real-Life_Timeline
And no, there is no "there was a 2 or 3 year lag", even with the examples of anime boosting volume sales for Jujustu Kaisen, Chainsaw Man and Demon Slayer, that boost while those shows were airing, not two to three years after they aired.
