Lots of folks use the Included Sandbox with the Windows Pro versions of 10 & 11. They allow scripts to be run to install apps, like Firefox and VPN's among many others during the OS spinup process.

Allowing the .launcher to have the login and password included would be a great feature or maybe a way to drop a file somewhere that had my configuration info in a place to have your launcher pre-populate those fields for launching the vpn app would be extremely helpful. Having to open my PW manager and copy and paste both the username and password each time I spin the sandbox up makes me no always use the VPN. (paid copy) I like using Proton but if some other vendor implements that feature I would have to switch.