Apple Silicon only. Download the .dmg, open it, drag Lineage to Applications. The other assets serve the in-app updater.
The app is not notarized, so macOS blocks the first launch. Run:
xattr -d com.apple.quarantine /Applications/Lineage.app
or use System Settings > Privacy & Security > "Open Anyway" after the blocked launch. First install only: existing installs update themselves from inside the app.