@strypey Wikipedia disputes are almost always over /references/ rather than /arguments/. Don't try to /convince/, but find /acceptable sources/ backing claims. There are some cases where things devolve further, but that's reasonably rare.
Look for a third-party source that says "Mastodon instances can share content with other open standards social networks including GNU Social, OStatus..." etc. Mashable, Vox, Forbes, Ars Technica, Business Insider. Better, a half-dozen or so.