"Is it art?" is only the first of many questions, and it's by far the least interesting.
It might be very interesting to someone who longs to make art but isn't sure whether their work qualifies...
This would presume there is a clear, objective standard, which wouldn’t seem to be the case.
I don't think it presumes that. I think they're just asking the wrong questions.
If not, then by what standard or metric could one determine whether or not one’s creations qualify as art?
It's just such an abstract idea. I'm sure there's all kinds of art that any one of us will say we don't like, don't connect with, don't understand, don't care about, etc., so unless this ambition to make art is purely professional or driven by external ambitions ("my life will not be complete until I have a show at MoMA!") it seems strange to worry about it so categorically.
How about starting with the work you care about. What does it do? What does it mean? How does it make meaning? What are the qualities about it that you admire? Why do you think it matters? Does it help you look at the world — or at looking — in fresh ways?
This is a non-exhaustive list of questions that has a fighting chance of pointing you toward doing work that means something and matters to someone. At least to you.
But the "is it art" question was pretty much beaten to death by the 20th century. Duchamp hung a snow shovel from a gallery ceiling in 1917. And this wasn't even the start of modernism. More like a closing exclamation point; it just took some people a while to figure out what was going on. "Is it art" doesn't really mean anything anymore—not the way it did in ancient Greece. Curators aren't asking this. They ask things like "does this matter?" "Does this show us something new about the world, or about the medium, or about our relationship to art, or about the current cultural conversation?"
These kinds of questions are about something. "Is it art" is about fussy and limiting and obsolete standards, typically made by old Eurocentric white men who have a status quo to defend.