One Piece is currently in the Elbaf arc ... That said, it might be connected to Skypiea, just as many other things are.

one group of objects that would make each arc easier are the Dials from One Piece’s Skypiea Arc. These mysterious devices each have a unique ability, basically mimicking modern-day technology.

Some things only look perfect.

The sagas explore the goal the Straw Hats are pursuing across multiple islands or the general region of the One Piece world ...