In the context of EU regulating stuff, "a license" (at least to me) is not automatically assumed to be with regards to software distribution rights. I get that the naming makes it look similar to the (L)GPL and so on, but that could just be marketing and/or someone trying to associate with known things.
The first paragraph after the main title would have been better if it had a second sentence:
What is the EUPL?
EUPL is an acronym for "European Union Public Licence". It is a software distribution license.
That would (to me) have made it so much more clear, and avoided having to build up confusion while reading until the purpose was revealed.