There is this page where we can see all the grants of Arbitrum: Arbitrum — Grants. I believe the Arbitrum Foundation Grant Program coming soon is the best fit for this type of proposal.
Great job on putting this proposal together! I appreciate the thought and effort you’ve put into aligning it with Arbitrum’s goals. In my view, we need a clearer roadmap to determine what to prioritize first. I also prefer to see a smaller pilot first and, if successful, scale it bigger.