In order and On tap

In order adjective - In a state of proper readiness or preparation or arrangement.

On tap and in order are semantically related. in prepared topic. In some cases you can use "On tap" instead an adjective phrase "In order".

On tap adjective - (of liquids) available by turning a tap.

In order and on tap are semantically related. Sometimes you can use "In order" instead an adjective phrase "On tap".