Yes, the Samsung Galaxy Watch works. The Galaxy Watch also works with an Iphone and all other Android devices that are reasonably current. I have a "Michael Kors Bradshaw Access MTK5012" this works perfectly with the phone.
Most likely... but tread carefully. If you unlock and root your phone, you will not be able to install the Samsung software necessary to communicate with the watch. You will need Magisk to trick safety net if you want it to work after unlocking.