Export All Tracks as Audio Files… ⇧⌘E

Create audio files of all tracks. Software instruments get converted to audio. External MIDI instrument tracks wind up with empty audio.

Export tracks as audio files in Logic Pro — Apple Support

You can export one or more selected tracks as audio files, or export all tracks (all audio, software instrument, and Drummer tracks) in a project as audio files—one file per track. When you export tracks as audio files, you can specify the naming of the audio files using filename elements.