Playlist iframe content not updated

[Watson-Sei]

I use Spotify with a free plan. My country is Japan.

The problem is that when I add songs to the playlist using the API, the playlist on the iframe side is not updated.

The iframe tag I am using is written below.
<iframe style={{borderRadius: '12px'}} src="https://open.spotify.com/embed/playlist/{playlist_id}?utm_source=generator&theme=0" width="100%" height="500" frameBorder="0" allowFullScreen allow="autoplay; clipboard-write; encrypted-media; fullscreen; picture-in-picture"></iframe>

Device.
Macbook, Chrome

I am looking for someone to help me with how to fix this problem.