I'd be surprised if it is less than 12kg. The premium lightweight aluminium bikes are anywhere between 6-8kg and when I say aluminium, it isn't just the frame, they tend to have alloy cranks, lighter wheels, saddle and seat post, handlebars etc etc...it all adds up to a big difference. Kids riding 16" wheel bikes are generally 4-6 years old and at this size, every kg makes a huge difference. Avoid this bike or it will just become a dust collector in the shed until you put it out for the scrap metal collector when you realise your kid has outgrown it without riding it much.
I'd guess around 8-10 kg. Based on similar specs.
Surprise surprise, no weight information :)
It’s stronger (lol)
I suppose its steel as its the cheapest option. So many kids bikes weigh an absolute ton. I dont know how they manage to ride anywhere but downhill. And don't say its stronger, the kind of forces needed to bend a modern bike are generally along the lines of it being hit by a car, or jumping a down a 6 ft drop with 100kg of armoured rider attached.