I don't think PowerShell is going to be able to help you with this, other than acting as a shell for command line programs.
netsh may be what you need: https://learn.microsoft.com/en-us/windows-server/networking/technologies/netsh/netsh-bridge
Others have tried managing a bridge with PowerShell but I don't think any have succeeded: https://stackoverflow.com/questions/48557190/create-a-network-bridge-between-two-network-adaptors