If your eMastered upload is your first release, it might take up to a week to appear on all major streaming platforms.
Even once it's live, there can be a slight delay before eMastered officially registers it on those services.
If you're attempting to confirm your Spotify for Artists profile and get a message saying the release hasn’t been found yet, either wait a little longer or try verifying your profile directly through Spotify.
Note that the priority release extra does not guarantee the track will appear live instantly, it simply means it gets submitted/reviewed by the distribution team as soon as possible and ahead of non-priority releases.