Resource requests can fit on SE, as long as they're objectively framed.
Does Resource X exist?
Should be fine.
Can you recommend a Resource X that you like?
Clearly isn't fine.
I don't see your sample question as particularly problematic--and apparently neither does the community at large. At the moment it's +1/-1, with no close votes.
It's not an especially strong question, though, but IMO, that's not because it's asking for a resource. The question's weakness, in my mind, comes from the fact that it's not well researched, as evidenced by the two built-in misunderstandings: 1) Languages share alphabets, 2) All writing systems use alphabets.
Also, the fact that Wikipedia has a list, which is mentioned in comments, suggests that the OP didn't research their question very thoroughly.
But even these perceived weaknesses didn't earn my down vote or my VtC.