Manually copy your save files from %ProgramFiles(x86)%\Ubisoft\Ubisoft Game Launcher\savegames\ before editing.
AC Origins Inventory Editor at Assassin's Creed ... - Nexus Mods ac origins inventory editor hash list portable
allow you to swap existing items for new ones by overwriting their Core Feature: Hash ID List Below are common Hash IDs for high-tier and DLC items in Assassin's Creed Origins that can be used with inventory editors: Mythical Warrior NG+ Outfit 0000017955049F41 Shadow Warrior Nightmare Outfit 0000015AC9AD5B71 Abyssal Steed Nightmare Mount 0000015AC9ADFCBA Lion's Mane Hunter Bow 00000078E76A2270 Sickle Sword 000000A2352E6F85 ac origins inventory editor hash list portable