LibreOffice can automatically apply numbering or bullets as you type.
To Enable Automatic Numbering and Bulleting
Choose, click the tab, and then select “Apply numbering – symbol”.
Choose Tools - AutoCorrect, and ensure that While Typing is selected.
The automatic numbering option is only applied to paragraphs that are formatted with the "Default", "Text body", or "Text body indent" paragraph style.
To Create a Numbered or Bulleted List While You Type
Type 1., i., or I. to start a numbered list. Type * or - to start a bulleted list. You can also type a right parenthesis after the number instead of a period , for example, 1) or i).
Enter a space, type your text, and then press Enter. The new paragraph automatically receives the next number or bullet.
Press Enter again to finish the list.
You can start a numbered list with any number.