I can get the existing version of ‘bridge connections’ on Win 10 20H2 to work partially; have to try reset network , try again. Sometimes it actually works.
I’m working to bridge thunderbolt3 adapters that become visible once a TB3 connection is made with the computer. In a three computer set up I can bridge the middle computer with the ‘virtual’ TB3 adapters so that each computer on the end of the bridge can reach all three.
Once the bridge is really done it works quite well – hunting for something more reliable.
I think the problem is that TB3 adapters are not persistent and in order to provide the reliability Ethernet Bridge have to reconfigure dynamically, e.g detect when TB3 adapters added/removed to/from the system.