Please follow the steps below to display products list on blog article page.

Step 1 : Go to store admin > Settings > Metafields and metaobjects > Blog posts > Add definition

Step 2 : Add data as below

Name: Related Products
Select field type: Product ( Select “List” )

Step 3 : Now go to blog post page, scroll down to “Metafields” section and Select products in “Related products” field

Step 4 : Open blog post page in theme customize and select metafield using dynamic source button.

Step 5 : Save article page and check page from front side.