paokfc.gr has one addition and included some kick off times (I presume EEST, but I’m not sure) and venues:
26-Jun: KAA Gent U23 19:00 Sporting Swolgen Tienray
29-Jun: RSC Anderlecht 19:00 Sporting Swolgen Tienray
2-Jul: FC Nordsjaelland 18:00 Sporting Swolgen Tienray
9-Jun: FCSB (as Steaua Bucharest is another entity and plays in Roumania’s fourth division) TBA
12-Jul: KRC Genk TBA
16-Jul: Al-Taawoun FC TBA