This backlink strategy that you described focuses solely on the quality of the backlinks.
This may not be enough.
Google has been releasing content quality updates for quite some time now, and they're getting tighter and tighter.
At the end of the day, Google focuses mainly on the value your content has on its search engine users.
They're not obsessing about the domain authority of the links that you have.
Instead, they're focusing on how well your articles deliver on search intent.
So instead of leaning too heavily on backlinks, which I believe is going through quite a bit of transition because of Google's heavy use of artificial intelligence, you might circle back to content quality and deliver on search intent.
And besides, generating 10,000 different articles with all these links doesn't look natural.
You have to understand that you have to get links from the right sites.
Are you sure there's enough niche relevance among the sites that you're building links with?
There's just too many variables here.
I'm sorry to say that a lot of them are actually counting against you.