I have found a company that specializes in making business specific keyboards for PC/Mac.
They have versions for Adobe Illustrator, Lightroom and Photoshop, also for other 3D/graphic applications - and also for other business types.
They are called "logickeyboard.com" - I pointed out to them that you exist, as I have made a complete swich from Adobe to Affinity - and would buy such a keyboard in an instant.
They asked me if I know how big a userbase Affinity Designer/Photo has - and was wondering if you could give some information in this regard - maybe even contact them and establish a dialogue.