I would happily pay for a different Icon.
Möbius Sync is a commercially supported app, so best to make a request via their online channels: https://mobiussync.com/
From a business point of view, changing even an icon can be an involved (and potentially costly) process once it’s been formally filed in paperwork.
Have you considered simply selecting a custom icon in iOS?
Good remark - I changed it using Shortcuts… and told Möbius Sync they
Could sell me an Icon via inapp purchase at any time 
Thanks.