And Oda has said One Piece is ending over the last decade more times than I can be bothered to count, don't underestimate a mangaka's ability to extend their manga well beyond when they say it will end.
I didn't know Gege and Oda the waffler are the same people, imagine making this argument.
Geges track record of doing what he says he will do is solid, Sukuna is the final villain and thinking otherwise is desperation.