How do I edit the burnout paradise remastered bundle file on the switch, I couldn't find any tools

 

Here's the switch remastered bundle file for you to analyze 

Burnout Paradise Remastered.rar

Game Extractor supports this format.

You can also use this script http://aluigi.altervista.org/bms/burnout_paradise_bnd2.bms

with quickbms.

If you follow this guy, he has a neat set of tools to unpack and pack back anything on the Chameleon engine games, Blender support, etc, some google drive links for his work were he posted stuff in the past, etc, just check it and you'll find what you need, it supports vehicles, maps, and more:
https://github.com/DGIorio