Measure RAM consumption in runtime for Nano BLE 33 sense - tensorflow

Question

I am now working with Nano BLE 33 Sense. I want to check how much of the SRAM the code is using, during each runtime. In my code, I simply define an array that is going to store the analog signal coming from a sensor. I used the ways that are discussed in the following links to track memory usage during runtime.
https://forum.arduino.cc/t/solved-measure-free-sram-of-nano-33-ble-sense-at-runtime/697716
Checking memory footprint in Arduino
https://learn.adafruit.com/memories-of-an-arduino/measuring-free-memory
However, when I change the array size from 100 units to 1000 the SRAM and flash usage do not change in any of the solutions provided above. Also, here is my code in Arduino IDE:
namespace
{
constexpr int ECGBufferSize = 10;
int counter = 0;
int16_t ECG_buffer[ECGBufferSize];
}
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
}
void loop()
{
// put your main code here, to run repeatedly:
int hello[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
while(counter < ECGBufferSize)
{
ECG_buffer[counter] = analogRead(A7);
counter++;
Serial.print(counter);
Serial.print("\n");
delay(5);
}
counter = 0;
delay(10000);
}
Please help me to find the correct way to track the memory usage of my Nano BLE 33 Sense.