Although I have looked quite hard, I have failed to find out if this years grand show in June is definitely cancelled.
2022 is on and I would be extremely surprised if this years show was on, especially with rising Covid-19 cases across Europe. Putting on a show would be expensive and it is unlikely many would want to be there in big crowds with the pandemic, even if they could travel.
The last definitive information I saw was that Dayton, USA was cancelled and Friedrichshafen 2021 was to be decided still. However, Southgate News is reporting that it is cancelled this year.
It is definitely not happening in 2021. I have found the official announcement of this. A pity, but understandable.
Notice the word "suspended" . There is an online event June 25th - 27th 2021.