ATtiny814 not going into power down sleep mode

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What I want to do: I want my ATTiny814 to sleep for 30 secs, wake up and blink an LED. Then go this in a loop.

What problem I am facing: ATTiny814 is not going into power down sleep mode.
I am saying this because it’s consuming 40uA in power down sleep mode and the datasheet says 2-4uA.
Also, when I change the sleep mode to standby sleep mode it consumes the same amount of current i.e. 40uA.
So I am anticipating that ATTiny814 is going into standby sleepmode in both cases.

What extra step am I missing to set the ATTiny814 in power down sleep mode?

My code:

#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/sleep.h>
#include “timers.h”
#include <util/delay.h>
#include <Arduino.h>

void RTC_init(void);
void LED0_init(void);
inline void LED0_toggle(void);
void SLPCTRL_init(void);

void RTC_init(void)
{
/* Initialize RTC: /
while (RTC.STATUS > 0)
{
; / Wait for all register to be synchronized */
}

/* 32.768kHz External Crystal Oscillator (XOSC32K) */
RTC.CLKSEL = RTC_CLKSEL_INT1K_gc; /*ULP Clock oscillator is being used*/

RTC.PITINTCTRL = RTC_PI_bm; /* Periodic Interrupt: enabled */

RTC.PITCTRLA = (RTC_PERIOD_CYC32768_gc) /* RTC Clock Cycles 32768 */
             | (RTC_PITEN_bm) | (RTC_RUNSTDBY_bm); /* Enable: enabled */

}

void LED0_init(void)
{
/* Make High (OFF) /
PORTB.OUT |= PIN1_bm;
/ Make output */
PORTB.DIR |= PIN1_bm;
}
//added for git commit

ISR(RTC_PIT_vect)
{
/* Clear flag by writing ‘1’: */
RTC.PITINTFLAGS = RTC_PI_bm;

PORTB.OUTTGL |= PIN1_bm;

_delay_ms(5000);

PORTB.OUTTGL |= PIN1_bm;

}

void SLPCTRL_init(void)
{
set_sleep_mode(SLEEP_MODE_PWR_DOWN);
cli();
}

int main(void)
{

for (uint8_t pin=7; pin<=1; pin--) 
    (&PORTA.PIN0CTRL)[pin] = PORT_ISC_INPUT_DISABLE_gc;

PORTB.PIN0CTRL = PORT_ISC_INPUT_DISABLE_gc;
PORTB.PIN2CTRL = PORT_ISC_INPUT_DISABLE_gc;
PORTB.PIN3CTRL = PORT_ISC_INPUT_DISABLE_gc;

LED0_init();
//SLPCTRL_init();
RTC_init();    

/* Enable Global Interrupts */
sei();

while (1) 
{
    
    //SLPCTRL_CTRLA = 0x05;
    set_sleep_mode(SLEEP_MODE_PWR_DOWN);
    sleep_enable();
    sleep_cpu();
    sleep_disable();

}

}

Platformio.ini file

; PlatformIO Project Configuration File

;

; Build options: build flags, source filter

; Upload options: custom upload port, speed and extra flags

; Library options: dependencies, extra library storages

; Advanced options: extra scripting

;

; Please visit documentation for the other options and examples

; Redirecting...

[platformio]

; Default build target

default_envs = Upload_UPDI

; Parameters used for all environments

[env]

platform = atmelmegaavr

framework = arduino

; Chip in use

board = ATtiny814

; Clock frequency in [Hz]

board_build.f_cpu = 5000000L

; Oscillator type (internal or external)

board_hardware.oscillator = internal

; Unflag build flags

build_unflags =

; Extra build flags

build_flags =

; Monitor port is auto detected. Override here

;monitor_port =

; Serial monitor baud rate

monitor_speed = 115200

; Run the following command to upload with this environment

; pio run -e Upload_UPDI -t upload

[env:Upload_UPDI]

; Upload protocol for UPDI upload

upload_protocol = jtag2updi

;upload_protocol = STK500v1 ;upload protocol changed to STK500v1 as per chatgpt

upload_port = COM8

upload_flags =

upload_speed = 115200

; run the following command to set fuses

; pio run -t fuses -e set_fuses

[env:set_fuses]

; Upload protocol for used to set fuses

upload_protocol = ${env:Upload_UPDI.upload_protocol}

upload_flags =

; Hardware settings

board_hardware.bod = 2.7v

board_hardware.eesave = yes

board_hardware.updipin = updi