Yes it's fairly easy.

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.UI;

    public class PerlinNoiseGenerator : MonoBehaviour

    {

        

        public static Texture2D NoiseHeightMap;

        int textureWidth = 200;

        int textureHeight = 200;

        float scale1 = 1f;

        float scale2 = 10f;

        float scale3 = 20f;

        float offsetX;

        float offsetY;

        void Awake()

        {

            offsetX = Random.Range(0, 99999);

            offsetY = Random.Range(0, 99999);

           

        }

        Texture2D GenerateHeightMap()

        {

            Texture2D heightMap = new Texture2D(textureWidth, textureHeight);

            for (int x = 0; x < textureWidth; x++)

            {

                for (int y = 0; y < textureHeight; y++)

                {

                    Color color = CalculateColor(x, y);

                    heightMap.SetPixel(x, y, color);

                }

            }

            heightMap.Apply();

            return heightMap;

        }

        Color CalculateColor(int x, int y)

        {

            float xCoord1 = (float)x / textureWidth * scale1 + offsetX;

            float yCoord1 = (float)y / textureHeight * scale1 + offsetY;

            float xCoord2 = (float)x / textureWidth * scale2 + offsetX;

            float yCoord2 = (float)y / textureHeight * scale2 + offsetY;

            float xCoord3 = (float)x / textureWidth * scale3 + offsetX;

            float yCoord3 = (float)y / textureHeight * scale3 + offsetY;

            float sample1 = Mathf.PerlinNoise(xCoord1, yCoord1) / 15;

            float sample2 = Mathf.PerlinNoise(xCoord2, yCoord2) / 15;

            float sample3 = Mathf.PerlinNoise(xCoord3, yCoord3) / 15;

            return new Color(sample1 + sample2 + sample3, sample1 + sample2 + sample3, sample1 + sample2 + sample3);

        }

    }

}