Can't access home LAN remotely using Wireguard

I have set up Wireguard and WGDashboard in a Proxmox LXC. I added my phone as a peer, and when connected to my LAN, I can use 10.0.0.1:10086 to access WGD.

When I try to access it from outside my network, I can't establish a connection to WG.

I have forwarded port 51820 on my router (BT SmartHub 2), and restarted it, but I still can't connect. My network isn't behind CGNAT, and allows VPN connections.

Using an online port checker shows 51820 is closed.
This is the PF rule:

https://preview.redd.it/z2go9te8960f1.png?width=721&format=png&auto=webp&s=45d99a68a36a5543022cc7e29855cf514093e6bf

How can I fix this?

Thanks