Help with collection page referencing other collection items

Hello awesome community!
I’m looking for a way to show some “blog posts” with a tag inside a product page that is also dynamic content!

the site im working on is about an organic products / zero waste brand, so, it have a few products and a blog where they give the user ideas to upcycle / re use the packaging of the products!

So, I have 2 collections in my CMS one for the blog posts and one for the products, each product page have a collection list to display the blog posts, but I cant find the way to just display the blog posts with the said tag for each different product item!

Here is my public share link: LINK
([how to access public share link][2])