No idea. I only know about aircraft talking to SoCal at the time. At the time there were numerous flights reporting to SoCal that their on board GPS had gone down. We didn’t know about anything else at the time.
If someone was jamming GPS there would be all kinds of ground devices having issues as well, unless the jamming was over the ocean and far enough out not to affect ground devices. Don’t forget, their US ground-based military tracking systems tracking those Russian aircraft that could also result in the inadvertent jamming of GPS signals. Civilian GPS signals are fairly weak.