Split Flow into Flows

Is there a way to split a flow into 2 or more flows… ? (w/o copy/paste/delete)

Not yet, no, but this is planned.

Would love to be able to copy a flow of Project A into Project B, and/or merging Projects. And it would be awsome if I could import MusicXml files into one Project.

Yes, all of these are planned, too.

Great to know this is planned😊 Would be extremely helpful working with XML

All of this is already possible. Take a look at the export / import submenus of the file menu. You can split flows with write > split flow.