Apologies if this was asked before....
I am unclear about the options of booking LATAM awards with other airlines' miles since it left OW.

I understand it should be bookable with DL, although availability at reasonable rates is pretty non-existent.
Some flights seem to be bookable via AsiaMiles and Qantas?
AS still shows LATAM as part of MileagePlan - is it still bookable?
What about BA?

Or is the best way to book Chase - Hyatt - LATAM, and how reliable is the LATAM availability search?

Thanks so much!