I think the second date there at the end is the Miye Oni trade date. That supports the conversion was in the original trade but was later removed from it.2026 first round draft pick to Oklahoma City
Utah's 2026 1st round pick to Oklahoma City protected for selections 1-8 (if this pick falls within its protected range and is therefore not conveyed, then Utah's obligation to Oklahoma City will be extinguished) [Oklahoma City-Utah, 7/30/2021; Oklahoma City-Utah, 1/4/2022]
This is what realgm.com says (and you, which I also thought was the case). I've always found their future draft pick page (https://basketball.realgm.com/nba/draft/future_drafts/detailed) to be very good and accurate.
I do sometimes use that page but their content layout and page design are tragic (albeit I now notice they have added mobile friendly UI support).