
Hello Steve. While Word for iPad Pro has more limited style management capabilities than its desktop cousin, it is still possible to apply and modify paragraph styles with a few additional steps.
To apply a style, tap anywhere in the paragraph, and tap on the paintbrush icon (Format) in the top toolbar, then scroll down to Styles. From there, you can choose from built-in styles such as Heading 1, Normal, or Title. If you want to modify a style, you need to format the text manually change font, size, color, spacing and then click "Update Style to Match Selection" (if available) or just apply the same formatting manually to the other paragraphs.
Best regards,