ACF relational fields

[StrangeTech]

@StrangeTech

The open questions we have are:

1. What is the correct way to reference ACF fields from a Query/Repeater in a nested Query/Repeater?
2. What is the correct way to do a nested taxonomy query using a term or terms stored in the field of a parent Query/Repeater?
3. What is the correct way to access the fields of a nested post object stored in a relationship field within a Query?

Question 3 matches yours exactly, so we also want to know this.