Which means on one hand that developers have no interest in and/or are not concerned with architecture. They won’t go looking for your architecture template, nor will they know what it brings to the table.
Those that do care about architecture also want to own the architecture, build their own. This is why these (expert/master skill) developers stay away from templated projects or only use them to learn more of the game/genre/tech-specific implementations and considerations.
The kind of demo gameplay you see in store assets is maybe about 100-300 hours of work put into them, at most. Even at only 10 hours a week demo gameplay should be doable within 3 months.
Hey, you have the comparative advantage on everyone else, you have the shiny new framework which I’m sure is super-good architecture and allows you to build your game superfast, since you said that was the value you would have offered if you were allowed to publish on the store.
Simple: prove them wrong and build something with your tool. And just think about the hours you would have to spend on answering newbies’ basic support questions instead of building something your own.