One. You can open the dialog box by "Insert"-"Special Symbol", and then select the "Number and Serial Number" tab, where you can find circled numbers, but there are not so many, up to 30.

Two. You can open the circled characters dialog box through Format-Chinese Layout-circled characters. In the Style column, you can choose to reduce the text or increase the circled numbers. In the circled number box, you can enter the text you want to add.