192.168.2.0/24 gets internet via WAN2
192.168.1.0/24 gets internet via WAN1 (Policy Routing)
The problem is that, I have to get access to the Server having static IP 192.168.1.x/24 from the any of the clients.
The clients having IPs 192.168.1.0/24 can access the server but clients having IPs 192.168.2.0/24 can’t.
You described what doesn’t work, but because you didn’t provide enough details (hint: /export), we can only guess what’s wrong.
So I’ll try one. Maybe you mark routing for 192.168.2.0/24 clients and their routing table doesn’t have route to 192.168.1.0/24. If so, you may add it, or use this: