Theory: Cavi Cape's Location

Abstract
Cavi Cape is very close to eastern Beanbean Kingdom, specifically the Oho Ocean and Teehee Valley.

Arguments

 * Argument 1: Both areas are coastal, with Teehee Valley having once been a part of the ocean that receded, Oho Ocean being an ocean and Cavi Cape being a Cape.


 * Argument 2: In Bowser Jr.’s Journey, Bowser Jr. encounters Oho Jees in Cavi Cape. Oho Jees are originally from Oho Oasis and are found in only these two locations across the games.


 * Argument 3: Teehee Valley is close to the Mushroom Kingdom, with it both being near Stardust Fields, the Mushroom-Beanbean border, and home to Little Fungitown, a town of Mushroom Kingdom immigrants that has Mushroom Platforms much like those found in the Mushroom Kingdom.


 * Argument 4: In Cavi Cape there is a crashed ship which has an identical build to the S.S. Chuckola, a Beanish vessel that once delivered Chuckola Cola/Reserve but sank and became stranded in Teehee Valley. The Cavi Cape ship has bottles of Chuckola Cola/Reserve scattered around, barrels identical to those found on the S.S. Chuckola and a near-identical internal and external structure. It also has a sign depicting a Chuckola Fruit, clearly establishing a connection between the two.