According to Swedish outlet Expressen, the move is fully agreed and Esenga is expected to be presented before the end of the week, with the defender having spent his entire career to date in Fulham's youth ranks since joining the club's Under-21 setup in the summer of 2023.
Esenga, who primarily operates at left-back but can also play centrally, registered one goal and seven assists in 25 competitive matches for Fulham's youth side last season, form that appears to have caught the eye of Elfsborg's recruitment staff.
He has yet to make a first-team appearance for the Premier League club, but the move represents a chance to test himself in senior men's football rather than continue developing solely at academy level in England.
Elfsborg currently sit seventh in the Allsvenskan with 24 points from 16 games, a mid-table position that leaves the Borås club looking to strengthen across several positions as the season progresses.
Bringing in a young English defender with Premier League academy pedigree fits a pattern increasingly common among Allsvenskan clubs, who have found success in recent years recruiting promising English talent unable to break into first teams at home and offering them regular senior football instead.
The switch also continues a well-worn pathway between English academies and Scandinavian football more broadly, where clubs like Elfsborg have built reputations for developing young players before selling them on at a profit further down the line.
For Esenga, the move represents a significant step up in senior competition, even if the level of the Allsvenskan itself sits below the Championship or League One, where he might otherwise have expected to continue his development in England.
He had also attracted interest from Leyton Orient and Burton Albion before opting for the move abroad, choosing regular senior football in Sweden over a similar step within the English lower divisions.