Cache is not at the listed coordinates.
In order to find this cache you will need to complete The Boardwalk Amble Adventure Lab Cache first. See details hereunder to download the App.
Mobile app smart link
Use your phone's native QR code scanner to open this adventure in the Adventure Lab mobile app, or share the following URL:
https://adventurelab.page.link/y4FX
This Adventure Lab has 5 Locations and you will need to complete the 5 locations first. The journal for the 5th location has the calculation to work out the coordinates for the bonus cache.
No bundu bashing required. Please use stealth when searching for the cache.