Go to Figma and open up any design that you would like to embed. Click the "Share" button and choose "Anyone with the link" for the "Can view" drop-down. Click the "Copy link" button at the bottom to copy the shareable URL.
Open a page or a post in AllAnswered. Paste the copied URL on a blank line and hit enter key. You will see the Figma design magically appears.
Alternatively, you can also use the Media menu of the editor to embed the design.