I’ve been in six different time zones in three days because of you.
After the final battle Natasha meets with Mason again and gets the quinjet she and Steve are using in Avengers: Infinity War.
The look of the scene appears to be Disney’s Golden Oak Ranch in Santa Clarita, CA. While the location of this shot is not 100% verified, a Hollywood Reporter article did confirm that Mason actor O.T. Fagbenle did fly back to Los Angeles for a reshoot, adding one more scene for his character.
(Black Widow, 2021)