What is this
The text is automagically translated to Swedish, but what is the English words for this?
My understanding is that this are units that are doing requests, but I don't have 315 596 computers at home
As rob said it's Unidentified devices and the number refers to the number of lookups / DNS queries made.
If you don't use DoT/DoH or the Apps to name your device, your device gets set as unidentified.
Basically, it's the number of queries made to that configuration from all your devices that aren't using names to identity.