Aside for onload being open source, not really. AF_XDP is the generalized, hardware agnostic, version of kernel bypass.
In addition to bypass onload also provides a full IP/TCP user space stack and non-intrusive support for existing binaries using the standard BSD socket interface (incidentally onload also supports XDP now).
io_uring is really for asynchronous communication with the kernel.
interesting, didn't know that the networking stack had ring buffer infrastructure as well. (i don't think this af_xdp stuff existed when i was in this world)
the fib trie is the core of the ip stack - i was using it as proxy for total ip stack bypass.