While I agree with you that some software isn’t capable of running on Linux (even through wine), there is another aspect that’s important to remember. Want and choice. The software that doesnt run on Linux is developed only for Windows because of market share. If more people used Linux, and more importantly, demanded Linux support, more software would support it. I WANT to use Linux instead of windows, so in order for that to become a reality, I push companies to support it and I talk to people and encourage trying Linux out. Can everyone make the switch? No, but some can; and the more that do the more Linux will be supported.
Your voice and opinion and choice matters. Don’t let a big corporation steal that from you. Even if you want to use Windows, you should still have the choice.
I don’t know this particular project but honestly having your government documents and policies made available on Codeberg/GitLab/Github and available for PRs is actually an interesting idea. The government would still need to be the owners and ultimately decide on what gets merged, but the transparency and opportunity for accessible civic engagement would be kinda sweet.