1. Create new UDeveloperSettings class

   #pragma once
   
   #include "CoreMinimal.h"
   #include "Engine/DeveloperSettings.h"
   #include "ClassName.generated.h"
   
   /**
    * 
    */
   UCLASS(Config = Game, defaultconfig, meta = (DisplayName = "Your Display Name"))
   class UClassName : public UDeveloperSettings
   {
   	GENERATED_BODY()
   
   };
   

2. Create variables

   #pragma once
   
   #include "CoreMinimal.h"
   #include "Engine/DeveloperSettings.h"
   #include "ClassName.generated.h"
   
   /**
    * 
    */
   UCLASS(Config = Game, defaultconfig, meta = (DisplayName = "Your Display Name"))
   class UClassName : public UDeveloperSettings
   {
   	GENERATED_BODY()
   
   public:
   	UPROPERTY(Config, EditAnywhere, BlueprintReadOnly, Category = "General")
   	TArray<FName> SettingsPropertyName;
   };
   

3. Add DeveloperSettings Module to Build.cs

   PublicDependencyModuleNames.AddRange(
   			new string[]
   			{
   				"Core",
   				"DeveloperSettings",
   				// ... add other public dependencies that you statically link with here ...
   			}
   			);
   

4. Load Class Defaults Object

   	const UClassName* ProperyName = GetDefault<UClassName>();
   	// Access defaults from DefaultGame.ini
   	OtherProperty = PropertyName->SettingsPropertyName;
   

<aside> 📄

https://dev.epicgames.com/documentation/en-us/unreal-engine/API/Runtime/DeveloperSettings/Engine/UDeveloperSettings

</aside>