Please check the tracker if there is something like this feature request or not. If not please create it there so we can upvote and get it done. 
Oh, you did already, nevermind then. I just upvoted.
Hello yes, in fact, the idea was taken out by @Luciano_Rodrigues. I made an example with a graph to complement, how good it would be in the future to have this option to clone a page. In the tracker we can vote from here for @Luciano_Rodrigues: Clone or duplicate Pages | Voters | AppGyver Community Edition
In the meantime, here is a workaround:
Put all UI elements on your page into a single container and turn it into a new component. Then use “Publish to marketplace” to get a key and use that key to install your “page” anywhere. Afterwards, simply edit the container to apply desired changes.
Hope that helps 
Or simply put all the components in a container and then press CTRL + C, then it will be copied. So if you open a new page, click on page layout and paste using CTRL + V…