Lounge access at London Heathrow airport

Is any lounge access available st London Heathrow T3 using niyo sbm card?

No .
Lounge access is in India only.

Hey @Sky4axis! Welcome to Niyo Community!

As @Irshad_Ali said, currently, the airport lounge access facility is available in Indian airports. Know more about it here: #FeatureUpdate > Airport Lounge Access ✈️