Looks like he's having his medical in Spain..
https://www.eluniverso.com/deportes/nota/6888653/billy-arce-destino-premier-league-inglaterra
The young figure of Independent Valley Billy Arce was transferred to Brighton & Hove Albion Football Club , Premier League of England.
The 20-year-old...
Loads of links on twitter if you search his name but not sure where it started.
https://www.benditofutbol.com/legionarios/brighton-hovecontrato-billy-arce-premier.html - seems to suggest its done but missing a few documents - which would surely mean its not done..
But the manager of his club...