Hi @XuanXin1 ,
Did you access the on the Bid Sur host? There's some limitation on Big Sur.
On Big Sur hosts, if user configures NAT port forwarding in Fusion, the service running in the virtual machine is unavailable on the macOS host using localhost:exposedPort, hostIP:exposedPort, or 127.0.0.1:exposedPort; Port forwarding is also not accessible inside a NAT virtual machine using hostIP:exposedPort.
Workaround: Access the NAT port forwarding through another physical machine with Windows or macOS; or
access the NAT port forwarding from a bridged virtual machine running on the same Mac machine as the NAT virtual machine.
Here's a link for your reference: