Thanks for the response. MMT is conceptually simple at a high-level, but also deceptively complex when you get into the weeds.
As a US citizen, I am personally not well-informed on the operations of the ECB beyond the basic principles of MMT. Fortunately, one of the most important MMT economists Bill Mitchell (who I reference in the article), writes extensively on the ECB and Eurozone in general. I’ll leave you some links to his blog below. I also suggest searching by the “Eurozone” and “Central Banking” categories on the right hand side of his blog. Here’s one published a few days ago:
I can assure you all MMT-related information published here is considered authoritative MMT since Bill Mitchell is one of the original MMT theorists.