Access IPSec-Tunnels "behind" the OPNsense from WireGuard-Peer

[tuxlemmi]

I have an OPNsense with a working WireGuard-setup for my mobile devices.
The peer-config routes all ipv4-traffic through the tunnel.
So far so good.

I want to reach subnets on site-2-site IPSec-tunnels (made by OPNsense) from the peer through the tunnel.

Do i have to include the wireguard-network on OPNsense in the IPSec-tunnel-config or is there another way?

Thanx.