Wireguard working but cant access S2S traffic

[sudo-kraken]

I have this all up and working I can access all VLANs I need to from the client however I have a S2S VPN setup in the UDM Pro to connect to my firends network, which is reachable from my VLANs but my Wireguard VPN can not see anything across the S2S VPN, how do I fix this as I need access to the other site, meaning that it would go Client >> My UDMP >> S2S Endpoint. I assume this is a routing issue but I cant fathom it out

[sudo-kraken]

Server

[Interface]
Address = 10.10.10.1/24
ListenPort = 51820
PrivateKey = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

[Peer]
PublicKey = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
AllowedIPs = 10.10.10.2/32

Client

[Interface]
Address = 10.10.10.2/24
PrivateKey = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
ListenPort = 21841

[Peer]
PublicKey = xxxxxxxxxxxxxxxxxxxxxxxxxx
Endpoint = xx.xx.xxx.xx:51820
AllowedIPs = 10.10.10.0/24,192.168.100.0/24

PersistentKeepalive = 25

This is the configuration that I have. I can't access the subnet 192.168.100.0/24 which is a site to site ipsec-vpn configured in the UDM Pro, if I change this to be any of my other local subnets then access works flawlessly, I just cant route over to the remote subnet on the S2S VPN.