Is ONE PIECE episode 928 filler?
Canon No, episode 928 of ONE PIECE is canon.
#928
The Flower Falls! The Final Moment of the Most Beautiful Woman in the Land of Wano!
花散る! ワノ国一の美女の最期
Aired 12 Apr 2020
Mochibayo compiled this list from MyAnimeList's labels, because MyAnimeList's episode data is not reaching us at the moment.