(S)NAT for IPSec Tunnel with a remote network in public IP range

Hello, I need someone to help me across the road:


I have a IPSec Tunnel (networks are just examples):

Local network 192.168.100.0 /24 <-> Remote network 192.168.200.0 /24

I have also additional local networks:

192.168.1.0 /24
192.168.2.0 /24
192.168.3.0 /24

Now I want to (S)NAT the additional local networks via a single host (192.168.100.254) in my local IPSec network through the IPSec Tunnel.

In the UTM it was very easy via a single source NAT rule: All traffic from (additional) local networks going to remote network -> change source to 192.168.100.254 host.

With XGS it seems not working that simple anymore...

Also created here an identical new source NAT rule with Translated source (SNAT) 192.168.100.254 (from (additional) local networks going to remote network) but I can not reach anything from my additional local networks.