Review times vary based on how many other assets are ahead of yours in the wait queue. Adobe receives thousands of submissions each week. You could wait as little as 15 business days or as long as 3 months. It all depends.
There is no way to speed up the process. You must wait your turn the same as everyone. Be patient. Work on other projects.
Focus on quality vs quantity. Compare your work with other Stock inventory to ensure your work is as good or better than what Stock has. And it fills a void that hasn't already been filled. In other words, don't submit low % sellers like clouds, sunsets, plants and pets. Adobe Stock has more than enough of those already. Dare to be different. Look for unique subjects and situations that will appeal to a wide range of customers.