Stuff gets loaded in the backend all the time. Even shoes that aren’t releasing on SNKRS. So seeing shoes in the backend don’t really mean much.
But if stock gets loaded (like actual stock with numbers per size), there’s a chance it’ll drop. And the time can be random so checking at 10am and done for the day is not the best plan.
People know how to check when something is about to drop, that’s why you always see those usual Twitter affiliates like Solelinks and J23 post hints like minutes before “shock” drops.