Calling a WSDL link through F5

Yes, you can do via F5, if you want to load balance or change something in that connection. This would be a simple load balance configuration.

It involves multiple steps, so I can't describe all here, and you also need to understand how F5 works to be able to do that.

Read this, should give you the basics to configure that:

https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/ltm-basics-13-0-0.html