Absolutely!
For new uploads, on the upload form at the track level, just select "Add (featured) artists to track title"
For singles, simply add them on album level.
To have a featured artist appear on all tracks of an album, add them as a "Featured Artist" in the "Artists" section at the track level.
For existing uploads:
Sign in to Anti-Joy
Click the album you want to edit
Click the edit button (pen icon) in the top right corner
Navigate to the "Artists" section
Add a new artist and select "Featured Artist"
If you want to add an artist to all tracks in a release with multiple songs, please add them on the album-level instead of adding them to each individual track, as this will get the release rejected.
If you want to add an artist to specific tracks in a release with multiple songs, but not all. Please add them to the track-level.
For a single, add the featured artist on the album-level.