Flying from KL, Malaysia to Lucknow, India with layover in Singapore [duplicate]

I am an Indian passport holder travelling from KL, Malaysia to Lucknow, India via Singapore. I have a multiple entry Singaporean visa and eNTRI from Thailand. My first flight (Jetstar) (KUL - SIN) arrives at 12:50. The outbound flight from Singapore to Lucknow is on the same day but from a different airline (Scoot). I have no check-in luggage and my outbound flight from (SIN - LKO) is at 16:00.

Will I have sufficient time to change the flights? Do I need to go through the immigration twice(for both inbound and outbound flights) in Singapore?

This is not a duplicate since I am asking about the Singapore airport in general and not only about the minimum connecting time. My question is about staying at the airside and taking the outbound flight(different PNR) without going through immigration.

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Can I transit through Singapore unvaccinated?

Customers transiting through Singapore Changi Airport can learn more about the transit experience on this page. Travellers, regardless of vaccination status, are allowed to transit through Singapore on all Singapore Airlines flights as long as they meet the entry requirements of their final destination.

Can you fly unvaccinated on Singapore airlines?

Yes, you are allowed to board the flight if you do not have a vaccination certificate. However, you will be considered unvaccinated, and will have to meet the requirements for unvaccinated travellers, including prevailing quarantine and Covid-19 test requirements upon arrival.

Do I need Covid test to fly Singapore Airlines?

I understand a Covid-19 pre-departure test is required within two days of the scheduled flight departure for travellers entering Singapore. How will the two days period be counted? The period of two days will commence from the scheduled departure of the flight to Singapore.

Is 1 hour enough for connecting flights in Kuala Lumpur?

If you doing international to international transit at KLIA, 1 hour should be enough provided flight delay is less than 15 minutes. You just need to walk from the arrival gate to departure gate.

India to Singapore via Kuala Lumpur Budget Trip Air Asia - Transit Visa Malaysia for Indian Citizens

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