Adobe Express pages and projects.
It would be super useful if it was possible to copy&paste (or drag) assets and pages from one project to another.

Example:
You are working on a Project and you already made multiple pages.
At some point you'd like to add a new page, but using a model (template) offered by Express.
At the moment, by selecting the model, a complete new and separated project is created.
Even after designing this new page (in the separate project), there is no way to copy it (or drag it) into the main (primary) project.
Not only you cannot do this with a page, but not even with single assets.
You can copy and paste within the same project, from one page to another, but at the present moment you cannot copy&paste assets (and pages) from one Project to another one. This would be a very useful feature and would speed the productivity.

At the moment the only "solution" is to finalize the new page with a template (new project), then download it and import it as a fix image in the main/primary Project.
This is not ideal because the assets cannot be move anymore.