Funimation is the leading platform for dubbed anime in English, though it's gradually merging with Crunchyroll. Regional licensing means some anime is only available in certain countries. A VPN ensures you never miss a new release. The reason for this is structural: streaming services license content country by country, and Funimation's catalogue in each market reflects whichever distribution deals were signed there. A title that's available on Funimation in the US might be on a competitor's platform in the UK, or vice versa.
A VPN sidesteps the geography problem entirely. Funimation sees the IP of GhostShield's exit server, not your real one, and serves you the catalogue for that exit region. The streaming app makes no distinction between a 'real' local user and a VPN-connected one as long as the traffic looks like residential broadband — which is exactly what WireGuard with ChaCha20-Poly1305 over GhostShield's network produces.
What you can't do is bend the laws of physics: a stream from Funimation's origin servers will always have more latency from far away. Pick the GhostShield server closest to Funimation's data centres in the region you want, not the one closest to you.