Agree with Paulius.
With that curl output you will definitely need to add a server ssl profile to your virtual server.
Since the pool member negotiated a secure TLS 1.2 cipher suite, you should be good to go with the default profile calles 'serverssl'.
Once you do add the server ssl profile, you should be able to monitor your pool;s statistics for traffic in and out, and the http request count (if you have an htp profile on the virtual server).
In case your pool members don't have a route back trough the BigIP for client addresses, you might need to activate SNAT Automap to your virtual server.