The 21-year-old has only featured five times for the Seasiders first-team, but has amassed 81 senior appearances in total through various loan spells.
Apter’s most recent stint away from Bloomfield Road was with Tranmere Rovers, as he enjoyed his most successful year to date.
The midfielder scored 13 goals and provided six assists in 40 games for the Birkenhead club, with his performances seeing him named as League Two Young Player of the Season.
Football Insider report the Seasiders have taken former Tottenham Hotspur youngster on trial, with the 27-year-old linking up with Neil Critchley’s side for pre-season training at Squires Gate.
Onomah has been out of football for the past year after failing to agree an extended deal with North End.
The ex-England youth international joined the Lilywhites in January 2023 after his contract with Fulham was mutually terminated.
“I thought he was fantastic when he came on,” the 45-year-old told the Lancashire Evening Post after his side claimed a 2-0 Good Friday victory over QPR.