I haven't heard anything from the two planned districts to be created in Yala province since 2015, when the government news reported a confusing story which read like they were already created. But since there was no announcement in the Royal Gazette, nor the latest geocode list added any codes for these, they must be still in the pipeline. But even regular searches for any websites mention the names of these two districts return almost nothing, so it felt like the planned might have been abandoned.
But just recently, the Kota Baru municipality (เทศบาลตำบลโกตาบารู) on their Facebook page added photos from a meeting on February 17, in which the location for the new district office was discussed. Sadly, while a photo of the officials inspecting a location was added, which plot of land was inspected or whether it was chosen isn't mentioned. Though I still don't know how what is the schedule for these districts, but at least it seems they are still on track.