It's not the same local network. You've created two networks, which only happen to use identical IP numbering but there is nothing that actually connects them. Unlike switch ports, multiple interfaces on a host or a router remain independent subnets – packets can be routed between them, but each would need to use different addressing to begin with.

If you want the VM to be attached to your physical Ethernet subnet (the existing 192.168.200.0/24 network), select Bridged mode in VirtualBox (and delete the Host-Only adapter).

It's not the same local network. You've created two networks, which only happen to use identical IP numbering but there is nothing that actually connects them. Unlike switch ports, multiple interfaces on a host or a router remain independent subnets by default – packets can be forwarded between them using routing (but each would need to use different addressing for routing to work), or the interfaces can be bridged together using the "bridge" feature in Windows (but I'm not sure whether it works with VirtualBox virtual interfaces).

If you want the VM to be attached to your physical Ethernet subnet (the existing 192.168.200.0/24 network), just select Bridged mode in VirtualBox (and delete the Host-Only adapter).