The inability to set app-icon for macros, is a huge turn off.
I was actually writing an forge confluence app thinking of releasing it to the marketplace. It’s really disappointing that there are numerous encouragement/mentions to adopting Forge and possibly via releasing them to the Marketplace, but without the ability to set macro icon for branding.
Release of a paid app, without branding is unimaginable; and Forge limitation here is penalising early adopters & first movers by not having the capability.
Related discussion: How to change macro icon and description in Forge?