Would this be possible with the fediverse?

So about a year ago, I remember seeing a guy testing out his blog comments section. What he had done was made a lemmy community, and every blog post he made, was a thread on the lemmy community. But here's the interesting part.....all comments on Lemmy in a thread were the same comments on his blog.

So if you have user@lemmy.world, and you go to his community, you see a thread, you comment.....your comment is now in the comments section of his blog.

Now today, I see these websites, from corporate websites that have reviews sections. Or news sites with comments sections.

And unless you're on a mega corporation like amazon, or youtube, these comments and reviews are mostly dead.

So I was thinking. What if there were a way to do this with multiple fediverse services?

What if you have an article, and the comments are 1 lemmy user, 1 mastodon user, 1 misskey user, 1 friendica user, ect ect ect? Basically start making ANY fediverse service a viable way to leave a comment, which can be replied to by any other fediverse user, regardless of service?

Now imagine all these websites that sell things that have 1-2 reviews. They almost always seem to be propriatary comments section that you need to register for that one website. And it doesn't work anywhere else. Which is usually why there's only 1-2 reviews.

But if they were using their lemmy account, that they already have, they could leave a review TODAY, and in a month leave a comment on another website using the same account.

And this would start to standardize the fediverse accounts as being universal across the internet, besides mega corps.

This in turn will grow the fediverse, because eventually people will say "hey, you know your fediverse account that you use to leave comments? Well thats a mastodon account. You already have it, and you CAN go on mastodon, and use it like you used to twitter back before it was a nazi platform. Mastodon isn't fascist."

From a technical limitations standpoint, is that even possible?