Copilot allows you to make use of buttons In the body of an article or gallery or review. The buttons can be used as a buy button or simply a read more button.

Follow the instructions as added in the user guide for https://intercom.help/formation/en/articles/1658873-building-an-article

Follow the instructions as added in the user guide for https://intercom.help/formation/en/articles/1658874-building-a-gallery

When you select Rich Text editor:-

To add a button in the body of an article click on the + sign and select the “button” icon or "BTN"

When you select Markdown editor:-

Adding Multiple Buttons in the Same Row

You can create multiple buttons in the same row by selecting an existing button and clicking the + sign which appears to its right.