Roger told that he would borrow Oden for final part of his journey.... WB could have asked for Oden's whereabouts when he met Roger for the final time.....And I'm sure WB knows that Kaido is ruling Wano....He surely must have thought Oden must be in trouble...But maybe Roger would have told WB not to interfere with Oden's fight as Oden requested Roger's crew not to interfere....