Confirmed: The core facts are supported by the cited primary sources.
The title fight
Cris Cyborg is scheduled to defend the PFL women’s featherweight world championship against Ketlen Vieira on August 22 at Benchmark International Arena. PFL presents the bout as Cyborg’s final MMA appearance.
The card around it
Gadzhi Rabadanov faces Tracy Reeder in the lightweight co-main event. The main card also lists Gustavo Oliveira against Marcirley Alves and Luke Trainer against Roland Dunlap.
Because championship status is explicit in PFL’s announcement, the Cyborg–Vieira bout carries the Fight Atlas belt marker. No other contest on the card receives that symbol without the same source-level confirmation.