How to fetch a library song via MusicKit or Apple Music API if the id a non numeric format?

If I fetch a library playlist like the generated "Favorites" playlist via MusicKit like this

guard let initialTracks = try await playlist.with([.tracks]).tracks else {
            return nil
}

I get a list of tracks like this:

...
TrackID:  i.e5gmPS6rZ856
TrackID:  i.4ZQMxU0OxNg0
TrackID:  i.J198KH4P85K4
TrackID:  i.J1AaRC4P85K4
TrackID:  i.4BPqWt0OxNg0
TrackID:  4473570282773028026
TrackID:  4473570282773028025
TrackID:  4015088256684964387
TrackID:  4473570282773028024
TrackID:  7541557725362154249
TrackID:  4473570282773028027

I save the IDs for later use, but when I want to fetch them, only the ones with ids that starts with "i." work.

static func getLibrarySong(from id: String) async -> Song? {
        var request = MusicLibraryRequest<Song>()
        request.filter(matching: \.id, equalTo: MusicItemID(id))
        
        do {
            let response = try await request.response()
            
            return response.items.first
        } catch {
            ...
        }
    }

Or the Apple Music API endpoint :

static func getLibrarySongFromAPI(with id: String) async -> Song? {
        guard let url = AppleMusicURL.getURL(for: .getSongById, id: id) else {
            return nil
        }
        do {
            let dataRequest = MusicDataRequest(urlRequest: URLRequest(url: url))
            let dataResponse = try await dataRequest.response()
            
            let response = try JSONDecoder().decode(SongsResponse.self, from: dataResponse.data)
            
            return response.data.first
        } catch {
            ...
        }
    }

Both functions above won't work for the non numeric like 4473570282773028024 so it seems the ID is wrong, but how do I make it work?

Otherwise I can fetch all the songs fine, in catalog or in the library, but these few songs can't be individually fetched, only with the try await playlist.with([.tracks])` fetch, that gets the whole playlist. But obviously this isn't always possible.

Thanks in advance!