I usually have my Buds Live and Samsung Galaxy Watch⁴ Classic simultaneously connected to Bluetooth.
This official Samsung Link says " Your Galaxy phone can be paired with multiple devices at the same time. "
Let us know how you get on please.
I'd say give it a go to see what happens.
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "