The codes for all the Safes in Dying Light 2 are provided below:

Safe #1 Nightrunner’s Hideout Safe Code = 1-0-1
Safe #2 Crocodile Flats Safe Code = 11-11-19
Safe #3 St. Joseph Medical Center Safe Code = 9-7-3
Safe #4 Side Quest Book Club X Safe Code = 21-12-55
Safe #5 Bazaar Tower Safe Code = 11-11-11
Safe #6 Horseshoe Water Tower Safe Code = 14-9-2:
Safe #7 House Safe Code = 22-67-66
Safe #8 Bridge Camp Safe Code = 74-17-76
Safe #9 Thugs: Bandit Camp Safe Code = 3-1-3
Safe #10 Dam Hideout Safe Code = 9-6-6
Safe #11 VNC Tower Safe Code = 6-6-6
Safe #12 Garrison Electrical Station Safe Code = 3-1-4
Safe #13 Little Boy Safe Code = 10-28-64
Safe #14 Wharf Water Tower Safe Code = 3-21-57
Safe #15 The Wharf Park Safe Code = 10-10-10
Safe #16 Church of Saint Thomas The Apostle Safe Code = 4-4-4
Safe #17 Dark Hollow Safe Code = 9-8-7
Safe #18 Container Safe Code = 85-19-45
Safe #19 Restaurant Safe Code = 4-5-9

Here are all the Safes locations in Dying Light 2:

Safe #1 Location: Nightrunner’s Hideout Safe is located east of Houndfield, Old Viledor.
Safe #2 Location: The Crocodile Flats Safe is found in the middle of Houndfield, Old Viledor.
Safe #3 Location: You will find the St. Joseph Medical Center Safe on the northeast side of Houndfield, Old Viledor.
Safe #4 Location: To find the Book Club X Safe, do the Book Club X Side Quest.
Safe #5 Location: Bazaar Tower Safe is exactly in the center of Trinity, Old Viledor.
Safe #6 Location: The Horseshoe Water Tower Safe is located in the
Safe #7 Location: You will locate the House Safe on the southern edge of Quarry End, Old Villedor.
Safe #8 Location: Bridge Camp Safe is on the border of The Wharf and Downtown, Central Loop.
Safe #9 Location: The Thugs: Bandit Camp Safe is at the Thugs on the northeast part of Downtown, Central Loop.
Safe #10 Location: To find the Dam Hideout Safe, look on the western outskirts of Garrison, Central Loop.
Safe #11 Location: You will find the VNC Tower Safe in the middle of Garrison, Central Loop.
Safe #12 Location: Garrison Electrical Station Safe is on the southern part of Garrison, Central Loop.
Safe #13 Location: The location of the Little Boy Safe is on the western side of New Dawn Park, Central Loop.
Safe #14 Location: The Wharf Water Tower Safe is on the northeast part of Muddy Grounds, Central Loop.
Safe #15 Location: To find The Wharf Park Safe, look on the border of The Wharf and Muddy Ground, Central Loop.
Safe #16 Location: Church of Saint Thomas The Apostle Safe is east of Saint Paul Island, Central Loop.
Safe #17 Location: The Dark Hollow Safe is at the southern edge of Saint Paul Island, Central Loop.
Safe #18 Location: You find the location of the Container Safe in the southeast part of Saint Paul Island, Central Loop.
Safe #19 Location: The Restaurant Safe is in the west center of New Found Lost Island, Central Loop.

Thank you very much, was struggling with these.