After a few years of near hiatus, it seems that Google Books has found a new partner, the city of Antwerp. They had been scouting for a while now, looking for a partner willing to scan at least 100k books.
https://www.blog.google/around-the-globe/google-europe/city-antwerp-and-goog...
I've checked a few versions of the press release circulated in Belgium and there's no clear statement on how the city/library will make the scans available, only a generic mention of the books being added to its online catalogue. For example: https://www.computable.be/artikel/nieuws/digital-transformation/6901998/5440850/google-en-antwerpen-zetten-duizenden-boeken-online.html
If someone finds the original press release, please share the link. I couldn't find anything on https://www.consciencebibliotheek.be/ nor https://www.antwerpen.be/ .
Federico