For that to work, you'll need the 'wait' versions of the remote flags. Those are still being worked on in a PR, but I'm hoping to finish them up by the next release: https://github.com/neovim/neovim/pull/17856
That said, this sort of remote opening has been possible in Neovim since the client-server stuff was added in the early days. This is only adding the remote editing flags and implementation to Neovim itself to make it easier.