I have Note 10+ and I have bought myself Buds+ since it has been advertised as being able to easily switch between two devices.
I have my Galaxy Watch connected to my phone via bluetooth.
My Buds+ are connected to my laptop via bt and my phone rings. I pick up, but they are not connected to my phone. It has happened only once after 10 seconds of having an open conversation with hallo, can you hear me and so on.
I have activated the option in the Galaxy Wearable App. In German it's called "Nahtlose Ohrhörer-Verbindung", but nothing.
The only reason I have bought them is because of this option.