Need to route the network by two way

I think there's a better solution for that, but I recommend you test it. You could create a pool with both gateways (SW1 and SW2).

After that, you can create a default route that points to the pool: https://support.f5.com/csp/article/K15582

The only thing is that I don't know if this will load balance the routes or if this is just active-standby default gateways. I never tested this.

Cheers!