Using monochrome wire-frames makes it easier to see the Flow and Logic of what's happening.
With new products or complete re-designs of existing products, there are often no designs other than brand guidelines.
Wireframes help to keep the UX Design Journeys and UI Design separated so they can be carried out at different times.
Highly collaborative software like Figma can provide an easy exchange between UX and UI.
Details blurred for security reasons.