How can I hide blockgrid button group for perticular document type after created?

Hi,
Thank you for the response. I have gone through the article.
but this is out of the box requirement for one of my project. I tried to add some style to hide button-group but it is not.

see below code. but it is not getting applied for those button. and also trying to do using some entrypoint logic.
if someone help me with this, it would be great.

export const onInit: UmbEntryPointOnInit = (_host, extensionRegistry) => {
// register the manifests
extensionRegistry.registerMany(manifests);
const css = document.createElement(‘link’);
css.rel = ‘stylesheet’;
css.href = ‘/App_Plugins/uWorkflow/index.css’;
document.head.appendChild(css);

}