@travelmore
Technically, but they do share a cable going from switch to pfSense. Other than that cable, it's a completely separate network.
I bet it's enabled on that laptop. 😃
Yes. That's what I thought you wanted to do from the start.
Won't need a new piHole though, you can just use the existing one but if you want another, go for it.
So that's why I said to make that network a /30.
A /30 gives you 4 addresses, the network address (in your case 192.168.20.0), 2 usable addresses (.1 and .2) and a broadcast address (.3).
If you go into the vlan20 interface, change the name, then change the IPv4 Address from a /24 to a /30.
Disable the dhcp server.
Then set the WAN on the lab pfSense to 192.168.20.2/30 as a static address.
That will give you a lab network with it's own router.
You can keep it at /24 until you're ready to connect the router, or keep it that way forever but there's no need since once the router is connected you'll never use more than 2 addresses.