They coordinated with who genetically modified Yelena using research from their Super-Adaptoid program.
Marvel Studios Episode 5 of Hawkeye picks up right where Black Widow kind of leaves off—with Yelena working to un-brainwash the numerous Black Widows out there in the world, looking to undo the work of the Red Room.
The Avengers and Wolverine evaded his fire attacks but Yelena was not as lucky.
She's found a former Black Widow who—as she soon learns—was not brainwashed, but has been working as a contract assassin.
Yelena is already in business with Val not good and her next target is Barton.
She fled into the jungle while enveloped in flames.