Before COVID, I booked some flights on Turkish Airlines (TK). Due to COVID, the trip is off the cards, so I'd like to get a full refund. However, under TK's policies, while I'm entitled to change the flights for free, if I initiate a cancellation, I would need to pay heavy penalties.
As it happens, though, the specific flight I was scheduled to take in December has been cancelled, and this cancellation has been published in the GDS. (The route is still operating, just not on my planned day.) However, when I called TK's call center, they told me my reservation for the now non-existent flight remains "Confirmed" and I should call back "later" to enquire about changes/refunds, although they couldn't tell me when this "later" is either.
TL;DR: How long does it take for schedule changes to filter down to individual reservations? Interested in both Turkish specifically and general rules of thumb. And yes, EC261 (the EU cancellation rule) applies to at least part of the itinerary.