The page only says “Blu-ray Disc media” without further qualification. Only MiniDisc is qualified as “recordable” on the page.

That being said, there are other Blu-ray Disc manufacturers, and I don’t see the production of Blu-ray discs ending anytime soon. There are new titles being released all the time: https://www.blu-ray.com/movies/releasedates.php

The writing is in the wall. The big physical retailers have either already been need physical media sales in store (e.g Best Buy) or have slashed inventory/stocking.

Disney straight up stopped releasing discs in Australia. I'm sure that will extend to other regions in the future.

Eternal Disney Vault

This is a new announcement to the one last year regarding consumer writable Blu rays being discontinued, I would believe this is them halting production of Blu Ray discs.

Someone else makes blanks, right?

Correct, Blu-ray media isn't going anywhere: https://www.howtogeek.com/sony-hasnt-stopped-making-blu-ray-...