Bit of a random one. I have a wattbike trainer and I downloaded Zwift in my S21. The Zwift app can't see the wattbike to connect? Wattbike Hub on my phone can see it.
Does your laptop have whatever is connecting the phone and wattbike together? Bluetooth/Ant+? If it doesn't then it won't be able to see it, phone obviously will have bluetooth and some android phones have Ant+ too...