Wireguard DNS Resolution Issue

[mattsyd7]

After searching for solutions online and here, I need assistance.
Pretty new to Pf Sense.

I used this guide to setup:
https://docs.netgate.com/pfsense/en/latest/recipes/wireguard-ra.html

I've setup a WG tunnel, can connect to LAN on the other side as a peer.
Needing to multiple peers to login (perhaps 2-3 at once) to server via RDP, (achieved) and resolve DNS on peer side, (not done).
The server handles DHCP, Pf Sense is a DHCP relay.

Have tried no DNS as well as DNS= 192.168.1.3, 1.1.1.1 and just 1.1.1.1 in my WG peer config on the WG Windows app.

Here's the config:
[Interface]
PrivateKey = ***
ListenPort = 51820
Address = 192.168.80.2/32
[Peer]
PublicKey = ***
AllowedIPs = 0.0.0.0/1, 128.0.0.0/1
Endpoint = ..***:51820
PersistentKeepalive = 25

Setup on other side is as follows.

1. Netgate 1100 23.05.1 (arm64)
2. On premises Windows server, dns is on 192.168.1.3 on site.
3. Server is on 192.168.1.2
4. Router in on 192.168.1.1
5. Have allowed ports 53 for DNS and RDP 3389 too.
6. In peer config on router, have allows DNS server's IP.

It didn't include adding WG to Interface>Assignments as a 3rd party guide I read suggested.

Should Static DHCP be ticked (Register DHCP static mappings in the DNS Resolver) in DNS Resolver> General Settings?

Not familiar with windows server, ( can do the basics) was setup before my time).