Idk if you have something like this in Singapore but I use an app called 'privacy' that let's me make vendor specific digital cards, and I can pause them, set limits, etc.
Nope, unlike in the US, there's no easy way to create virtual credit cards freely in Singapore (afaik). Might be a result of Singapore law, monopoly power of the banks, or just a lack of awareness that such a thing is possible.