Weasyprint [0] is OSS and supports CSS Paged media. I’m not actually sure why you’d ever use something like this project (or headless chrome for that matter, maybe you need some automated login as well?) which doesn’t.
print-css.rock [1] has a good overview of available tools and their features.
print-css.rock [1] has a good overview of available tools and their features.
[0]: https://github.com/Kozea/WeasyPrint
[1]: https://print-css.rocks/