Samsung Warches are eligible to Bluetooth connect to all current Samsung Warches as long as it can have the Samsung Wearables App on it and high enough software and ram support as far as I'm aware @member232
From another link "
Galaxy Watch6 and Galaxy Watch6 Classic: Phones with Android 10.0 and RAM 2.0 GB or higher are supported. "
On the samsung.com website there us a live chat option to speak to an adviser. They'll also be able to officially clarify.
Daily Driver > Samsung Galaxy s²⁴ Ultra 512Gb ~ Titanium Black.The advice I offer is my own and does not represent Samsung’s position. I'm here to help. " This is the way. "