There is a difference between the Trent and the GE90 in terms of fuel piping layout. If I interpret correctly the various photos I have googled the GE engine has all the fuel pipery and pumps around the core. On the Trent the fuel starts outside the fan casing and then goes through pipes which pass through the fan airflow on their way to the core.
The Trent certainly has some fuel system components mounted on the outside of the fan case. I'm not certain but
afaik the GE90 has all the system mounted on the core.
However, both engines have to get the fuel through the fan airflow. The only difference is which components are outside and which are inside.