The thing to keep in mind is that, while 1.18 was delayed, the content intended to be in by the end of summer -- whether it all be in 1.19 or some of it is split into 1.20 -- is that it's been worked on independently of any delayed material.

My go to example is chocobos. In the tenth letter from the producer, a "Mount system (including chocobos)" was being assessed, and nothing more. Then two months later, we got info that rental chocobos were a certainty for 1.19.

Until Yoshi-P gives us the 1.19-focused letter from the producer, there's no telling how far along anything is. Hopefully that letter comes next week.