Hi,
I was testing toolbox in a VM (virtual machine) with Fedora Rawhide (which when I created the VM it was Fedora 33) and I realized that the Fedora release has changed. I created a new Rawhide VM and now it says that it’s Fedora 34.
Anyway, I tried to create a toolbox’s container and I couldn’t because there is no official image for Fedora 34 
So, I created an unofficial image for Fedora 34, so anyone that is on Rawhide can create new toolbox containers.
I used the same configuration that the official images, but with the new Fedora version.
As the Fedora registry was failing a bit the last weeks, I had created a personal mirror of the official images, so I added the new image there:
https://hub.docker.com/r/juanje/fedora-toolbox
You can create a toobox’s container, using this image, with the following:
$ toolbox create --image docker.io/juanje/fedora-toolbox:34
Or:
$ toolbox create --image docker.io/juanje/fedora-toolbox:34 --container some-name
I’m sure the new official image will be available soon, but meanwhile, I hope this is useful.