Music and syncing with iTunes Match

Hi I’m using a MacBook Air and an iPhone 8 - all fully updated and with storage space available. when I add music from mp3 files on the MacBook, it syncs immediately to my phone . When I add a CD directly it does not. In my Music library I get different options when I right-click on mp3 imported and CD imported music. ( the first has a ‘remove download’ option, whereas the second does not). Manually selecting Update cloud library does not fix the issue.