People don't fear things when their frame of reference includes way more extreme things that are fine.
Obviously not everyone can just fly a bunch to do half assed exposure therapy, but maybe something like VR?
But for exposure therapy, you're probably going to want to go with Microsoft Flight Sim 2020, right? I think it supports VR and it's probably the most visually accurate experience. I could be wrong though as I've never played it myself.
I also played a bunch of Warthunder in VR. The sense of height in those smaller planes is really freaky.
Well there's your issue. Anxiety attacks are like a rushing river, if you try to swim against or stop the current you'll get nowhere. Ride it out and know that if you felt things got really got bad, you could ask any airline attendant for help - they deal with nervous flyers every day across tens of thousands of people every year and would help you through it compassionately and respectfully. We're all in this together man, nobody is going to make you feel bad for being human.
I used to date a physiologist researching/specialized in how to overcome anxiety.
We all see people advising stupid things every day, because it's worked for them so far. There's the lichtenberg wood burning people who explain how to pull out a microwave transformer and use it to burn patterns into wood... and fail to acknowledge just how likely it is to kill you.