There are several workspaces I use, aka UI Layout placements, that differ based on what phase I'm working on.
I use one workspace for general layout, a different workspace for creating and/or editing text, a different workspace when reviewing/proofing the document and image quality, and a different workspace when rigging the document to make an interactive PDF, and etc. I feel that it is important to have a way to save, export, import, and select which workspace (UI Layout) we want to work in for these separate tasks, as currently, it is subpar with the industry. And this is something that will keep me from using Affinity Publisher as this process eats up valuable time resources to always be switching UI Layouts for each part of the process.
The attachment is one found with InDesign, and I find their preset workspaces to fulfill my needs with slight modifications. Please adopt this feature in a later release.