Dispatch effects with EditorView, not getting result

Following from Communicating with editor extensions I was trying to dispatch sort of effect but I don’t get any changes in obsidian.

this.addCommand({
	id: 'test-command',
	name: 'Testing my command',
	editorCallback: (editor, view) => {
		// @ts-expect-error, not typed
		let editorView = view.editor.cm as EditorView;
		editorView.dispatch({
			effects: StateEffect.appendConfig.of([
				EditorView.decorations.of(
					Decoration.set(
						Decoration.line(
							{attributes: {style: "font-weight: bold"}}
						).range(0)
					)
				),
			])
		});
	}
});

Similar thing works in codemirror

import {Decoration, EditorView} from "@codemirror/view"
import {StateEffect} from "@codemirror/state"

let ev = new EditorView({
	doc: "console.log('hello')\n",
	extensions: [],
	parent: document.body
});

ev.dispatch({
	effects: StateEffect.appendConfig.of([
		EditorView.decorations.of(Decoration.set(Decoration.line({attributes: {style: "font-weight: bold"}}).range(0))),
	])
})

Could anyone help what I’m getting wrong here?

I found that its doable with

this.registerEditorExtension([
	EditorView.perLineTextDirection.of(true),
	EditorView.decorations.of(Decoration.set(Decoration.line({attributes: {style: "direction: rtl"}}).range(0))),
]);

even it seems EditorView.perLineTextDirection.of(true) is unnecessary.