As Paul suggested, you would need a numbered paragraph style and then apply that style to each of the numbered paragraphs. For the unnumbered paragraphs with tab stops but no numbering in them, use a separate para style.

You can use the built-in List Number style as a starting point for your numbered list; use the Modify Style dialog box to alter the numbering as desired. Or you can create a custom style for the purpose.

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Stefan Blom
Microsoft Word MVP

Microsoft 365 apps for business
Windows 11 Professional