Wireguard, handshake working but no internet access

So I have deployed a wireguard container and everything seems to be working even the handshake between the server and my windows 10 client. But, I have no internet connection when using the VPN.

I am running it in Rancher but here is how the docker compose file would look like.

  wireguard:
    image: ghcr.io/linuxserver/wireguard
    container_name: wireguard
    cap_add:
      - NET_ADMIN
      - SYS_MODULE
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Europe/Zurich
      - SERVERURL= ----
      - SERVERPORT=51820 
      - PEERS=laptop,phone
      - PEERDNS=8.8.8.8
    volumes:
      - /home/levin/wireguard:/config
      - /lib/modules:/lib/modules
    ports:
      - 51820:51820/udp
    restart: unless-stopped                                                                                         

And here is my wg0.conf

[Interface]
Address = 10.13.13.1
ListenPort = 51820
PrivateKey = ---
PostUp = iptables -A FORWARD -i wg0 -j ACCEPT; iptables -A FORWARD -o wg0 -j ACCEPT; iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE 
PostDown = iptables -D FORWARD -i wg0 -j ACCEPT; iptables -D FORWARD -o wg0 -j ACCEPT; iptables -t nat -D POSTROUTING -o eth0 -j MASQUERA>
                                                                                                                                         [Peer]
# peer_levin_laptop
PublicKey = ---
AllowedIPs = 10.13.13.2/32

[Peer]
# peer_levin_phone
PublicKey = ---
AllowedIPs = 10.13.13.3/32

And yes I have port forwarded the necessary port. Any Ideas what could be wrong?

PS: I have tried the suggestions of other similar posts like this one.