If you can be fined for driving with flip flops, it is something that comes back every year, like the question of whether the sunscreen you left half last year is still effective.
Can you be fined for driving with flip flops?
Driving with flip-flops is not punishable unless it affects driving safety in any way, because it does not allow the pedals to be well controlled, for example.
Translation: no, but yes. That is, a traffic police will not stop you and look at your feet to put a fine on you if you wear flip flops. He will do so if he finds that driving with these shoes poses a danger.