some questions about energy and fluid storage system

question 1: How many different types of fluids can a single block store at once?

question 2: If a single block can store multiple types fluids at once how do I display them in text gui for each fluid?

question 3: Im still trying to figure out how to display fluid/energy guages that were seen in a pic from the 2020.4 update page and the tutorals dont show how to do this.  How is this done?

any help here would be great