useNavigate with option flushSync

[kruchininfl]

Hi!

I noticed some unexpected behavior regarding the flushSync option.
According to the useNavigate documentation, the navigate function accepts a flushSync option that should wrap DOM updates in ReactDOM.flushSync.

However, when using the underlying Navigator.push() and Navigator.replace() methods (which power navigate), the flushSync flag seems to be completely ignored — the navigation update is still batched/asynchronous.
I expected with flushSync: true React should synchronously render components with the new context (location, params, etc.).

Is this a bug or the intended behavior?