Create UStaticMeshComponent variable from C++ | Setup it in Blueprint | Rotate UStaticMeshComponent from C++

RotatingActor.cpp

// Fill out your copyright notice in the Description page of Project Settings.

#include "AnotherCamera/Public/RotatingActor.h"

// Sets default values
ARotatingActor::ARotatingActor()
{
 	// Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
	PrimaryActorTick.bCanEverTick = true;
}

// Called when the game starts or when spawned
void ARotatingActor::BeginPlay()
{
	Super::BeginPlay();
}

// Called every frame
void ARotatingActor::Tick(float DeltaTime)
{
	Super::Tick(DeltaTime);

	if(RotatingObject)
	{
		RotatingObject->AddRelativeRotation(AddRelativeRotation);
	}
}

RotatingActor.h

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "RotatingActor.generated.h"

UCLASS()
class ANOTHERCAMERA_API ARotatingActor : public AActor
{
	GENERATED_BODY()
	
public:	
	// Sets default values for this actor's properties
	ARotatingActor();

	UPROPERTY(BlueprintReadWrite, EditAnywhere)
	UStaticMeshComponent* RotatingObject;
  
	UPROPERTY(BlueprintReadWrite, EditAnywhere)
	FRotator AddRelativeRotation;

protected:
	// Called when the game starts or when spawned
	virtual void BeginPlay() override;

public:	
	// Called every frame
	virtual void Tick(float DeltaTime) override;
};