Hey lochmann224,
We are happy to help out! Once an Apple Music family subscription has been shared, and accepted by the recipient, it should be available immediately.
Looking at the link If you can't find your family's shared content - Apple Support make sure all the settings are in place.
Check your Family Sharing settings
Make sure that you're using the same Apple ID for Family Sharing and Media & Purchases. And make sure that purchase sharing is turned on. Then ask your family members to check their settings too.
On your iPhone or iPad with iOS 16 or later
1: Go to Settings > Family.
2: Tap your name.
3: Make a note of which Apple ID is listed.
4: Tap Purchases.
5: Tap Apple ID for Purchases and make sure that you're signed in with with the same Apple ID that you use for Family Sharing. If not, tap Share using secondary Apple ID and enter the Apple ID and password for that Apple ID.
If you still need help, take a look at the article we shared above by clicking on the link, there are additional steps to try.
Take care!