Danka, the rollout details are mentioned in [[Use built-in VPN in Firefox]] — not everyone's getting it right away. Once you're enrolled, you'll see the button and the whole ceremony around it as shown in the documentation. There are threads that describe how to avoid that wait if you feel like tinkering with inner settings on your own, e.g.: https://support.mozilla.org/questions/1578173 — depending on how eagerly you need the feature "right now" and how reliable that might end up for your location.