On TE Connectivity Aerospace part number 1532214-1, what is meant by the Reverse Layout feature, which is listed in the Product Attributes on the Digi-Key Website?
The Reverse Layout feature refers to the pin location marking on the bottom side.
Note 2 on the datasheet says: Position 1 shall be indicated by an identifiable mark, located approximately as shown on the position 1 side of the connector flange.
So a Reverse Layout will have a different location of the #1 pin, than a Standard Layout.
Both types will work and function the same, but will have different markings for the pin numbers.