If you've set a future release date, your music will appear in services on the date you specified.
If you've set a past release date, your music will appear in services as soon as possible.
It is advisable to select a release date for your music at least four weeks in the future if it is crucial that it goes live on a specific date across all selected services simultaneously. Opting for a release date less than four weeks in advance may result in your album being held up in a service's review queue or experiencing unforeseen delays, causing it to miss the intended release date.