Really cool!
I haven’t looked into how you have the tool designed, but any interest in making this a rust library? For example, GitHub - cloudhead/nakamoto: Privacy-preserving Bitcoin light-client implementation in Rust has it on their roadmap to add BIP324, and I’m sure there are others. Seems like having a library would be generally useful and something that your proxy could be built around.
I’m also not fluent in Rust but learning and looking for small-ish projects to work on, so I’d be more than happy to help work on a BIP324 rust library if you’re interested in collaborating.