@Hannah28It should work, as you will need to install the Galaxy Wearable App, and I would recommend the Galaxy store app as well.
You will also need to sign up to the Data plan for the watch
Their is a a video as well below that tells you how to do it.
https://www.youtube.com/watch?v=mDBVZ4GwCyc
- Xperia 1V - o2 and Spusu
- Pixel 8 Pro - o2 and Vodafone UK