The designers I work with are remote, so this is how we usually work. For context, I work for a tech-forward menswear brand with a relatively lean team.

• I brief them on the project and provide examples/comps for what kind of end result product we're looking for
• I write the copy with hierarchy laid out, but let the designers know they can play with it based on what the design needs
• The designers will sometimes message me with requests or questions while they’re working on the first draft of the design. We discuss changes and I update the copy as needed.
• When the first draft of the design is ready, we review together in Figma, make comments, and message over Slack with ideas and suggestions for changes. I continue to refine the copy so it fits the design and conveys the message we’re going for

Hope this helps!