I reached out to the maintainer of osvbng, and he was really receptive about it. I may contribute to the project in a few months.

Meanwhile, I also found another project that works with eBPF-accelerated BNGs for k8s edge deployments. https://github.com/codelaboratoryltd/bng (BUSL-1.1 license though)

Thank you for listing me the projects. Really helped me out!!