version : 0.28.0
os : windows 10
option of “C_Cpp: Clang_format_fallback Style” can not change.
Can you clarify what you mean?
Is this setting item removed in 0.28.0? This setting doesn't work at all...
This setting cannot be applied in this window. It will be applied when you open local window.

If you're using a remote session, it should be changeable in the Remote or Workspace or Workspace Folder settings.

This is intentional, because your remote machine's instance of clang_format may not accept the same fallbackStyle that your local machine is able to use.
These settings are all removed in 0.28.0... Is there a fast way to config them on all my remote machines?
I think it would be better to have a place to set the default setting for all remotes... And the extension use the remote's settings only if the local's are not acceptable.

Are you saying you want a setting that applies to all the different remote machines you use? For that, I recommend filing a feature request at https://github.com/Microsoft/vscode-remote-release/issues .
The change we may was based on recommendations from https://github.com/microsoft/vscode/issues/73985 .
I'm not sure how we would know if the remote settings are acceptable or not.
Currently, this is by design. We changed it due to feedback we received from the VS Code team at #3774 . Closing this issue.
Most helpful comment
If you're using a remote session, it should be changeable in the Remote or Workspace or Workspace Folder settings.
This is intentional, because your remote machine's instance of clang_format may not accept the same fallbackStyle that your local machine is able to use.