Manually sync purchased iTunes music to MacBook Air
How do I manually sync all my purchases of music selections from iTunes onto my MacBook Air? Help says: learn how to do it manually, if you don't have an Apple Music subscription or iTunes Match (whatever that is). I don't have either. But the instructions, when responding to my click, only show transferring from the iPhone to my Mac. I've been purchasing iTunes music for many years (at least 10 or more). I never had a problem when my first Mac was "alive." But I have the new Air and have found missing music when I click on some. And it is unclear why many have not been downloaded as they had been previously. I transferred all data from my old Mac to this Air about 6 months ago, and didn't realize the problem until recently. I have not had any space problems on my Mac or in iCloud.
How do I sync all my purchases so I can then decide what to download (or maybe download all purchased music)?
MacBook Air 15″, macOS 26.4