What artists can customize
Apple Music now supports artist logos and custom colors for the Info, Play and Favorite buttons on artist pages. Logos can be submitted through Apple Music Connect and remain pending while Apple reviews them.
Label Engine says logo review can take up to five business days, while approved button-color changes can appear more quickly.
What to do before release week
Claiming and cleaning up your artist profile should happen before the release is already live. Make sure the release is linked to the correct profile, then update images, branding and other profile details with enough time for store review.