When you are using a Block theme, you will not find the Customize menu as before. Therefore, you will not see the Additional CSS option either.
However, it still exists in WordPress, and you can access it.
Here’s how:
1. Go to Appearance > Editor.
2. Click on the website preview (in the middle of the page).
3. Click on the Styles icon.
4. From the side panel, click on the three-dot icon and then select Additional CSS.
The CSS panel will open.
