It is not a DNS based block, but on the IP level. Once I knew what caused the issue, I figured I use one of my Hetzner vServers as an exit node in tailscale.

But come on, this can't be true. I wonder how many other people in IT wasted hours on issues and tickets to find out it is due to a football match taking place. Admittedly, chances are low, as football matches are usually outside of office hours.