Jagdfliegerführer Oberitalien (Fighter Leader Northern Italy) was part of Luftflotte 2 (Air Fleet 2), one of the primary divisions of the German Luftwaffe in World War II. It was formed in July 1943 in Bologna and subordinated to the Luftflotte 2. The headquarters were located at Bologna and moved to Pontecchio on March 18, 1944, moved again on July 15, 1944 to Verona.
The German Luftwaffe was formed in July 1939.
It's never mentioned when the German Luftwaffe itself was formed, only when this specific division was formed. It's difficult because the text says "it was formed" right after mentioning the German Luftwaffe, so this probably confused it.