I'm running macOS 11.2.1 on a Mini M1 with one internal and two external drives. Using multipass 1.8.1+mac to create an Ubuntu 20.04.3 LTS instance in terminal. Once in terminal, I can find the 3rd party software I installed while in the shell. However, when I want to find some of the files I see in Ubuntu on the Mac drive, I cannot find them. I clearly don't understand the relationship between the file system in the ubuntu shell and the Mac File system. As an example, this is from Ubuntu

ubuntu@primary:~$ ls

Home  findtestfile.txt  mycroft-core  snap  var

I even created a txt file so I would have something easy to search on, but these files and folders are not together anywhere on the Mac system using Finder (and showing hidden files). Where are they? Help!