I have been trying to make an HTTPs request with the SIM A7672X module using the tinyGSM lib but am having issues, i was following the example from: randomnerdtutorials with minor modifications as we use a different SIMCOM model, below is my code:

    #include <Arduino.h>

    #define TINY_GSM_MODEM_A7672X

    // #define TINY_GSM_MODEM_SIM7000SSL
    #define TINY_GSM_RX_BUFFER 1024 // Set RX buffer to 1Kb

   // Set serial for debug console (to the Serial Monitor, default speed 115200)
#define SerialMon Serial
#define SerialAT Serial0

#include <TinyGsmClient.h>
#include <ArduinoHttpClient.h>

#define TINY_GSM_DEBUG SerialMon
const char apn[] = "internet.ng.airtel.com";
// const char apn[] = "web.gprs.mtnnigeria.net";
const char gprsUser[] = "";
const char gprsPass[] = "";

// Server details
const char server[] = "gist.githubusercontent.com";
const char resource[] = "/RuiSantosdotme/7db8537cef1c84277c268c76a58d07ff/raw/d3fe4cd6eff1ed43e6dbd1883ab7eba8414e2406/gistfile1.txt";
const int port = 443;
// const int port = 80;

TinyGsm modem(SerialAT);

TinyGsmClientSecure client(modem);
HttpClient http(client, server, port);

#define UART_BAUD 115200

#define PIN_TX RX
#define PIN_RX TX

void setup()
{
  // Set Serial Monitor baud rate
  SerialMon.begin(115200);
  delay(10);

  SerialMon.println("Wait...");

  // Set GSM module baud rate and Pins
  SerialAT.begin(UART_BAUD, SERIAL_8N1, PIN_RX, PIN_TX);
  delay(6000);

  // Restart takes quite some time
  // To skip it, call init() instead of restart()
  SerialMon.println("Initializing modem...");
  // modem.restart();
  // modem.init();

  String modemInfo = modem.getModemInfo();
  SerialMon.print("Modem Info: ");
  SerialMon.println(modemInfo);

  Serial.println("Make sure your LTE antenna has been connected to the SIM interface on the board.");
  delay(5000);
}

void loop()
{
  modem.gprsConnect(apn, gprsUser, gprsPass);

  SerialMon.print("Waiting for network...");
  if (!modem.waitForNetwork())
  {
    SerialMon.println(" fail");
    delay(10000);
    return;
  }
  SerialMon.println(" success");

  if (modem.isNetworkConnected())
  {
    SerialMon.println("Network connected");
  }

  SerialMon.print(F("Performing HTTPS GET request... "));
  http.connectionKeepAlive(); // Currently, this is needed for HTTPS
  int err = http.get(resource);
  if (err != 0)
  {
    SerialMon.println(F("failed to connect"));
    delay(10000);
    return;
  }

  int status = http.responseStatusCode();
  SerialMon.print(F("Response status code: "));
  SerialMon.println(status);
  if (!status)
  {
    delay(10000);
    return;
  }

  SerialMon.println(F("Response Headers:"));
  while (http.headerAvailable())
  {
    String headerName = http.readHeaderName();
    String headerValue = http.readHeaderValue();
    SerialMon.println("    " + headerName + " : " + headerValue);
  }

  int length = http.contentLength();
  if (length >= 0)
  {
    SerialMon.print(F("Content length is: "));
    SerialMon.println(length);
  }
  if (http.isResponseChunked())
  {
    SerialMon.println(F("The response is chunked"));
  }

  String body = http.responseBody();
  SerialMon.println(F("Response:"));
  SerialMon.println(body);

  SerialMon.print(F("Body length is: "));
  SerialMon.println(body.length());

  // Shutdown
  http.stop();
  SerialMon.println(F("Server disconnected"));

  modem.gprsDisconnect();
  SerialMon.println(F("GPRS disconnected"));

  // Do nothing forevermore
  while (true)
  {
    delay(1000);
  }
}

and bellow is the output from the serail monitor:

Initializing modem...
Modem Info: ATI  Manufacturer: INCORPORATED Model: A7672E-FASE Revision: 
    A7672M7_V1.11.1 IMEI: 867255079839140 +GCAP: +CGSM,+FCLASS,+DS
Make sure your LTE antenna has been connected to the SIM interface on the board.
Waiting for network... success
Network connected
Performing HTTPS GET request... failed to connect