I have been added to an apple music family but i can’t access my apple music . why ?

Hi Lasee,

Welcome too the Apple Community.

Here's a couple of links to Apple Support articles that may be helpful.

If you can't see your family's shared content

https://support.apple.com/en-au/HT201454

Or

For the administrator of family sharing:

Download family members’ purchases on iPhone

https://support.apple.com/en-au/guide/iphone/iph4cd8953e2/14.0/ios/14.0

Hope that helps you enjoy sharing the Apple Music :)