It will not happen. The only way Iran can enforce the fee is by actually shooting missiles at ships that don't pay. This is an act of war and terrorism; and in our current international order, is not viable solution. The UAE, Saudi Arabia, and other gulf countries, will never agree to it.

Another reason it won't work -- by Iran's logic, every nation adjacent to a strait of water can levy a toll on ships that pass through.

Why doesn't the UK charge tolls on ships that pass through the English channel, and bomb them if they don't pay up?

The same logic applies to the Strait of Gibraltar (Spain, UK, Morocco) and the Strait of Malacca (Malaysia, Singapore, Indonesia).

It will unify countries against Iran and maybe they’ll actually participate to open the strait like Trump asked them to