Apple Music snippets/purchase on Catalina iMac
I have a number of Apple devices associated with my Apple Music account. I usually play via my Apple TV and iPhone and sometime on my M1 iMac running Tahoe. So far so good.
However, I've just discovered that there has been some degree of update on iTunes which I previously used on my, admittedly old, iMac which runs Catalina.
On my other devices, I can search and play pretty much anything for free. However on my old iMac, I can only play a short portion of any song and Music displays prices for the purchase of these. I'm signed into my Apple Music account on all my devices and the Catalina iMac is authorised on my Apple Music account.
Is this just a limitation associated with the degree to which Apple Music has been integrated with iTunes or am I missing something...? TIA