Final Cut Pro is sold exclusively through the Mac App Store. Apple does not officially distribute standalone DMG files for FCP. However, if you Final Cut Pro previously, you can download older versions through your "Purchased" tab in the App Store on an older Mac running Mojave.
: It is highly recommended to finish and export any active projects before performing a version update. manually trigger the legacy media scan in version 10.4.6? Import 4K on Final Cut 10.4.6 / Create 9:16 version final cut pro 10.4.6 dmg