The mintstick project provides two utilities.
The first one is dedicated to formatting USB sticks: USB Stick Formatter
The second one is used to make live USB sticks from ISO images: USB Image Writer
This project is developed in Python and its source code is available on [Github] https://github.com/linuxmint/mintstick
Homepage: https://github.com/linuxmint/mintstick and https://linuxmint-developer-guide.readthedocs.io/en/latest/mint-tools.html
Upstream has been contacted: Yes https://github.com/linuxmint/mintstick/issues/79