I definitely second the request for additional customization options for shortcuts. Especially on IPad.
I am almost exclusively working on Affinity Designer on IPad and was recently trying to improve my workflow by integrating a bluetooth Numpad into it to use certain makros/shortcuts.
While I managed to optimize some of my workflow by doing that, there are several shortcuts/commands missing that are essential for true increase in workflow speed. Namely:
Undo/Redo (!!!!)
Switch between Personas (Vector/Pixel)
Escape/Deselect (same as on the X button on the lower left)
New Pixel Layer (New Vector Layer is already customizable, why not this one)
Change Brush Size +/-
Zoom to fit
Lasso Tool