1. Convince the executive team of why this is a worthy problem to solve. The only business impact any product can have is acquiring new users (new revenue), increase deal sizes with existing customers (expansion revenue with monetization), minimizing customers churning (retention revenue).
2. Clearly answer why you need to focus here now. Associate your proposal to a compelling trend that is relevant for your business.
ROI is key here. Sounds like you have traction you just need to tie it to an existing important business outcome your company already cares about. I have also done and currently doing intrapeneuriship and this is how I have been successful in getting ideas funded and brought to market. The best ideas usually are increasing revenue through monetization, it's usually less risky than pitching to acquire new customers.