Unbeaten middleweight Agyarko, 28, will face 30-year-old Englishman Ishmael Davis, whereas 35-year-old McKenna will tackle fellow Irishman Dylan Moran.
McKenna stopped Moran within the second spherical of their welterweight contest in Waterford final December.
Matchroom have additionally confirmed Patrick Brown, who represented Nice Britain on the 2024 Olympics, and Commonwealth Video games bronze medallist Aaron Bowen will seem on the invoice, with extra fights nonetheless to be added.
Earlier this week, Windsor Park was confirmed because the venue for Donovan and Crocker’s contest for the vacant IBF welterweight belt.
The stadium final hosted a boxing occasion in August 2018 when two-weight world champion Carl Frampton defeated Australian Luke Jackson.
Donovan and Crocker’s rematch would be the first world title bout between two fighters from Eire.
Their first assembly on 1 March was a ultimate eliminator for the IBF title and resulted in controversial fashion with Crocker taking the win by disqualification in entrance of a 8,500 crowd on the SSE Enviornment in his native Belfast.
