Multiple reports have surfaced that Ubisoft+ is now available for users in Europe. This means that if you are in Europe and have an Ubisoft+ subscription, you will be able to play Ubisoft games on the Google Stadia, GeForce Now, and Amazon Luna cloud gaming services.
The author of the article then confirmed that it is available in the Netherlands and was confirmed to be in the UK by a commenter.
This appears to have been a silent rollout in Europe. Still, it allows those in the newly supported countries to play games through the Ubisoft+ subscription on their PC, Google Stadia, GeForce Now, and Amazon Luna when available in Europe.