Here is how long it will take for your music to hit stores if you did not submit a specific release date 2-3 weeks prior to submission:
iTunes: Most releases take 24-72 hours to go live in iTunes however a random percentage of releases go through an internal store review process, which can take up to 16 BUSINESS days from the day they’re received by the store. Please note, Repost has no control over iTunes’ internal review process and cannot expedite your release. If you have a required release date we recommend that you deliver your music assets more than a week prior to that date.
Spotify: 2-3 business days
Amazon Music, Deezer, iHeartRadio: 3-7 business days
Amazon On Demand: 6-8 weeks
Google Play: 1-2 weeks
All other stores take 1-3 weeks