Managing 2 watches on one iPhone

Hi,

I bought my preteen daughter an Apple Watch with cellular service. I manage her watch and my own Apple Watch from my iPhone. Overall this works, but we’re running into limitations because my iPhone can only fully manage apps and services for my primary watch.

For example:

• She can’t download the Spotify app on her watch because it’s already installed on my watch.
• She can’t fully use Apple Music on her watch because it syncs to my Apple Music account instead of hers.

Is there any way around these limitations so she can use apps and music independently on her Apple Watch?