[2] He made his top tier debut on 14 August, coming on in the 70th minute for Anthony Lozano in a 1–1 draw with Levante UD.
[3] On 10 August, he switched teams and countries again after agreeing to a one-year loan deal with Portuguese Primeira Liga side F.C.
[5][6] His first goal came as the match-winner against Birmingham City on 19 September 2023 and allowed Preston to retain their spot at the top of the Championship.
[7] On 9 April 2024, he came on as a late substitute in a home game against Huddersfield Town and scored a hat-trick in six minutes to cement a 4–1 win.
[9] On 22 September 2024, Osmajić caught attention following a derby match against Blackburn Rovers, as imagery suggested he had bitten opposition player Owen Beck’s neck; who received a red card, as he kicked-out at Duane Holmes.