What episode does Arc WANO start?

It started a couple years ago on episode 890, right after the Reverie Arc concluded.

When did WANO one piece start?

The season began broadcasting in Japan on Fuji Television on July 7, 2019. On April 19, 2020, Toei Animation announced that the series would be delayed due to the ongoing COVID-19 pandemic. They later scheduled the series’ return for June 28, 2020, resuming from episode 930.