Downloaded code zip from Figma Make miss the images under figma:asset/

After I created a website in Figma Make, I downloaded the code into a zip file. However, all of the images missed.

I looked into the code and find the images are in the following format: “figma:asset/<id>.png";
However, the assets folder is not in the downloaded zip.

Where can I find the assets? Is there a possible solution?