In the group message, I saw that Little Tiger posted such a text, which was actually underlined.
T͟a͟b͟0͟1 | Tab02 | Tab03 | Tab04
So I asked him how he did it, and he sent this picture:
press the shortcut key ctrl+ cmd+ 空格, open the character monitor, then search for combin , find the underline symbol, and insert it into the text.