I did it from yesterday, alongside with the post on community.

@xperiments Thanks for the response. I open the ports 500 and 4500 on ISP modem and doesnt work

@shberge I configure it on both networks Building A Building B But nothing works. Another configuration of port forwarding is that on destination IP I set the public IP of each building respectively...

with wan ip doesnt work because Omada gateway is behind a NAT device.@shberge

@shberge I use this format and nothing works. So, the problem arise from something else

@xperiments Thanks fot the response. I forgot to mention that with IKEV1 (with one LAN on both buildings) vpn is working fine. Also I have adopted router TL-R605 (on both buildings) on omada hardware...