On his jet registration [1] it lists the code as A835AF and I believe this is the flight to LA in question [2]. This means that he was not using the spoofed ICAO code from PIA, broadcasting the publicly known one instead.

[1] https://registry.faa.gov/aircraftinquiry/Search/NNumberResul...

[2] https://globe.adsbexchange.com/?icao=a835af&lat=37.359&lon=-...