Problem getting POST to send data

Using Arduino Networking, Protocols, and Devices
1

I am using an Adafruit ESP32-S3 board and trying to send temperature and humidity data to a php file on a website. The sketch compiles and runs, returning a HTTP Response code of 200.
However the data.php does not receive any data.
I added a var_dump($_POST); command to the start of the data.php, which returns array(0) { }.

Despite lot's of searching and different code this has me stumped. So I would appreciate any help from the brains trust!

#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <HTTPClient.h>
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>

const char* ssid     = "myssid";
const char* password = "mypassword";

const char* serverName = "https://mywebsite.com/mypath/data.php";

String apiKeyValue = "apiKeyValue";

#define SEALEVELPRESSURE_HPA (1013.25)

Adafruit_BME280 bme;  // I2C

void setup() {
  Serial.begin(115200);
  
  WiFi.begin(ssid, password);
  Serial.println("Connecting");
  while(WiFi.status() != WL_CONNECTED) { 
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to WiFi network with IP Address: ");
  Serial.println(WiFi.localIP());

  bool status = bme.begin(0x77);
  if (!status) {
    Serial.println("Could not find a valid BME280 sensor, check wiring or change I2C address!");
    while (1);
  }
}

void loop() {
  if(WiFi.status()== WL_CONNECTED){
    WiFiClientSecure *client = new WiFiClientSecure;
    client->setInsecure(); 
    HTTPClient https;
    https.begin(*client, serverName);
    
    https.addHeader("Content-Type", "application/x-www-form-urlencoded");
    String httpRequestData = "api_key=" + apiKeyValue + "&value1=" + String(bme.readTemperature())
                           + "&value2=" + String(bme.readHumidity()) + "&value3=" + String(bme.readPressure()/100.0F) + "";
   
    Serial.print("httpRequestData: ");
    Serial.println(httpRequestData);
    
    int httpResponseCode = https.POST(httpRequestData);
     
    if (httpResponseCode>0) {
      Serial.print("HTTP Response code: ");
      Serial.println(httpResponseCode);
    }
    else {
      Serial.print("Error code: ");
      Serial.println(httpResponseCode);
    }
    https.end();
  }
  else {
    Serial.println("WiFi Disconnected");
  }
  delay(30000);  
}