The problem is that this isn’t just my problem: being able to use your own router is required by FCC rules and IPv6 access is something that should be standard at this point especially for new build outs. I am happy to help them solve both problems. The point is that a municipal broadband would have it be accountable, while a private corporation has fewer restrictions.
Am I paying you money?
Then it's your problem.
Sorry, but a 50$ a month subscription does not entitle you to speak with network engineers.