I purchased the items in the link I provided. Prior to this I saw a store selling the full trims with the lights installed, but I have a 2020 7.5 GTI, as per my avatar, and I didn't really want to lose my factory trim look, and I didn't need a set of 5.
So when this version of just the three parts showed up I was very interested, and even though they could not provide instructions I decided to purchase to give it a go, as my lighting mods will really finish off the car. This one and the rear door sills.
Mind sharing pictures of what you received?