Compiling 2.0 (at least for Stretch; didn't test Buster yet) works
quite well, for example when using the tree as of
https://salsa.debian.org/debian/bird2/
Maybe there's another place to look (and we didn't look in the right
place) or maybe there's simply no one compiling the packages for the
public.
If applicable, I would like to help out albeit by hosting a package
repository or compiling (or both).