Singapore and AFAIK Thailand banned vapes altogether. And it seems to be actually enforced. They have completely different grounds for it but still, there's already some movement in this space.
Pipe and roll-your-own tobacco are also banned in Singapore, but regular cigarettes are sold just fine. There may be a different reason for the bans.
Not. I've seen young teenagers vape in Thailand, that's how enforced it is. They only catch foreigners from whom they can extract thousand-dollar bribes.
Vapes illegal, but weed legal, that's great