This is off-topic because it's clearly not about "governments, policies and political processes", not because media is off-topic on Politics.SE. This question is asking for the reason why a particular newspaper ordered their stories in a specific way.
only the editors will know for sure why they ordered the stories in this way. In addition, even if it is about "governments, policies and political processes", it would still be considered off-topic as it is primarily opinion-based and there is no correct and factual answer.
There can be various different reasons to this – the fact that Daily Mail historically priorities entertainment news first, the fact that it's not confirmed whether Al-Baghdadi was actually killed as Russia says it may have killed him, etc. All these factors might have affected the page ranking, but we don't know for sure.
it is off-topic as one particular newspaper ranking the stories in this way is not representative of all newspapers on a whole.
The OP mentioned in comments that it is "indirectly about foreign policy, and hence about government", the fact that one newspaper ranked the stories in that way is not representative of all newspapers. Surely, there will be other newspapers that ordered the stories in a different way. So, it cannot be attributed to the government's foreign policy since it's not published by the government in the first place.
this particular question is off-topic.
As for media questions, many are on topic (as seen from the number of questions tagged media). Questions such as Why won't Donald Trump do something about “fake news”? are about the constitution, thus they are on-topic.
Basically, they have to be about "governments, policies and political processes" and they need to have a factual answer, as opposed to speculation ones.