Hey @luksak,
At the moment, we only support changing region for function backed content. For static content, we usually see cache hit ratio of about 70-80% for a site, so after an initial load, the site should most likely be fetched from the nearest location instead of the origin.
But, this is not optimal in some cases probably and we can see that you wish to change the data-center location. While there are no immediate plans to do this, we would add this as a feature request and update if something changes in this area.