Look for the “Additional Information” widget in the list of available Single Product widgets. Configure the widget’s settings, appearance, and content according to your preferences.
It has 3 tabs: Content, Style, and Advanced.
1. Layout
This tab has a general section.
1.1 General Section: Activate this button to display the title.

2. Style
This tab has a Heading Style and Content section.
2.1 Heading Style:. Adjust the typography, color, and margin of the heading style.

2.2 Content: Customize the typography, color, border type, and padding of the content.