Is a Server Changer built into FC 27 Hacks?

Yes. The SERVER tab carries a Server Changer covering 35+ locations, London, Bahrain and Frankfurt among them, for latency and lobby hunting, and the disconnect tools live on the same tab.

A region, not only a ping

The tool does more than shave milliseconds. A different region also means a different matchmaking pool, so a slower connection into a quiet region can outperform a fast one into a stacked lobby. With 35+ locations, the list runs well past London, Bahrain and Frankfurt, which leaves a close option most of the time plus a few distant picks worth testing.

Timing a switch

Do it between matches, when a lobby feels wrong at the lineup screen. Swapping regions between games costs nothing; swapping mid-match invites exactly the desync trouble the DESYNC bypass is there to absorb. Pre-match decision, full stop, not something to fiddle with after kickoff.

What else the SERVER tab holds

Lock Screen, Disconnect Match, Bail Me Out, Disable AI, Leave Match Without Loss and a custom disconnect reason round out the tab. They share space with the server list because both attack one problem: who decides how and where a match starts or finishes, you or the matchmaker and your connection.