As a developer + artist myself, I know lots of my developing friends aren’t great with music.
If you want something more original, because most of the time people can tell when music is AI, I recommend checking out both Garageband and Bandlab.
In Garageband, you have access to thousands of free beats, melodies, chords, etc, which you can just drag and drop in. The app auto fixes the tuning, so every single note is on the right key and sounds perfect.
Another alternative, if you don’t own a mac, iPhone or iPad is Bandlab, which has over 100K sound packs, samples, and loops you can use on your songs. Keep in mind that Bandlab does not automatically adjust BPM and Key to match your other parts of your song, so you’ll need to watch a couple of music theory tutorials or similar videos.
Hope this helps!