I cannot share iMac Music files with other Macs

I have an iMac 27" 2019 with Sonoma 14.5 installed.

I have a MacBook Air 2018 with Sonoma 14.5 installed.

Both devices are on same WiFi, signed into the same Apple account.

I have followed the instructions for home sharing in System Settings as per Apple's instructions.

I cannot see my iMac's Music library on my MacBook Air.

I can see the iMac's Music Library and play songs via my iPhone and iPad.

What am I doing wrong?

Thanks.