Docker enable VirtioFS via config file

While not directly answering your question, I found a way to check if it is enabled at least.

The Docker Desktop settings file has a line that indicates if VirtioFS is enabled or not:

"useVirtualizationFrameworkVirtioFS": true,

The settings file depends on the OS, where is the location for Mac and Linux:

case "$( uname )" in
  Darwin)
    settings="~/Library/Group Containers/group.com.docker/settings.json"
    ;;
  Linux)
    settings="~/.docker/desktop/settings.json"
    ;;
esac

Changing the setting manually didn't work (it get stuck on "Starting")