If I understand the request correctly, you want to move between pages with Keyboard Shortcuts? That would be:
"Shift+3" - Cut
"Shift+4" - Edit
"Shift+5" - Fusion
"Shift+6" - Color
"Shift+7" - Fair Light
"Shift+8" - Delivery
You can also add "Open in Timeline" under the Edit section of shortcuts. I made that one "Cmd+Shift+4" so that I can select something like a compound clip or nested timeline and open it with out having to right-click. You can also do the same for "Open in Fusion" which I set to "Cmd+Shift+5". So they're like modifyers of the main "Shift+4" and "Shift+5" page switching.
So now:
"Cmd+Shift+4" - Open in Edit
"Cmd+Shift+5" - Open in Fusion
Making those standard would probably help out a lot of people.
The ones you CAN'T toggle YET are the different areas of the screen like "Media" or "Properties". This is especially noticeable in Fusion for "Spline Editor" and "Keyframe".
Here was my request for such a layout...

- Keyboard Shortcuts_Alt0000.jpg (687.54 KiB) Viewed 81 times