Hey, chawn69!
To share Apple Music with Family Sharing, let's first check you have the Family plan. From your iPhone, open the Music app. From there, head over to the For You page and tap the profile icon in the top right corner. From there, scroll down and press View Apple ID. Once you've verified your identity to view that page, open the Subscriptions menu. Your Apple Music subscription should clearly state Family and a length of time.
Assuming that is all correct, the next thing we can do is check your husband is a part of your Family on iCloud. Head over to Settings, and tap your name at the top. From there, tap Family Sharing. If your husband appears there, scroll down and check that Apple Music is set to On.
The final thing for you to do is on your Husband's Mac, to open the Music app and ensure he's signed into his Apple ID - the same one you have added to family sharing. If he is, he should automatically have access to Apple Music.
If the above steps don't work, then you may need to contact Apple support for further assistance.