The forthcoming revision of the European Network Code on Requirements for Generators (RfG 2.0) introduces Grid-Forming (GFM) capability requirements for Power Park Modules and Electricity Storage Modules. For offshore wind farms (OWFs), the electrical network between the Wind Turbine Generator (WTG) terminals and the onshore point of connection (PoC) may influence how these capabilities are transferred to the transmission system. This paper investigates that influence for a representative 735 MW High Voltage Alternating Current (HVAC)-connected OWF by comparing a complete network, including transformers, cables, and shunt compensation, with a reduced transformer-only configuration. The assessment combines analytical impedance calculations, vendor-specific electromagnetic transient simulations with Thevenin-equivalent grid representation, and system-level EMT validation using a measured oscillation event from the Western Danish (DK1) power system. The results show that the complete OWF network increases the effective transfer impedance and reduces the grid strength experienced by the WTGs. Although the inertia-like response to a Rate of Change of Frequency (RoCoF) event is largely preserved at the PoC, the responses to phase-angle and grid-strength disturbances are strongly shaped by the offshore network. Both configurations nevertheless provide same synchronizing and damping during the investigated system oscillation in DK1 network. Hence, it is proved that the Thevenin-source-based tests reveal intrinsic GFM behavior under controlled grid conditions. However, system-level damping also depends on the network topology, operating points, modal participation and interaction with other converter-based resources which need to be investigated for a project to achieve desired GFM performance.