In addition to the new version of zbus, there is also now a new version of tonic, which will need to be dealt with if this package is to remain in trixie. I had a quick poke in the upstream git history and there seems to be a commit doing the update.
https://github.com/containers/netavark/commit/c198914c4ab1c03a60fdfc900be90ecb0661a9b2
