How to connect to strongSwan VPN server from RouterOS RoadWarrior client inside NAT

Is there someone who knows how to connect to strongSwan VPN server from RouterOS RoadWarrior client inside NAT?
・RouterOS 6.43.7
・strongSwan(ver 5.7.1) server: ipsec.conf is bellow.
config setup
uniqueids = never
conn rb
authby=xauthpsk
xauth=server
left=%any
leftsubnet=0.0.0.0/0
right=%any
rightsourceip=10.234.56.0/22
auto=add