It looks as if that Golf R has been fitted with the GTI Clubsport OEM rear spoiler and spats - looks identical to the one in the picture at the link below;
https://www.kunzmann.de/shop/en/ext...w-golf-7-gti-genuine-volkswagen-clubsport.htm
You’ll see from the ‘suitable for’ details at the link above that it states the Clubsport spoiler / spats won’t fit other performance Golfs. This is because the Golf GTI Clubsport uses a different tailgate to the other performance Golf models (R, GTI and GTD) - it uses the tailgate from non-performance Golf models which has a smaller in-built spoiler above the rear screen. So assuming the spoiler and spats fitted to the Golf R in the picture you’ve posted are genuine VW items from the GTI Clubsport, then it’s had the tailgate replaced to accommodate them.
If you look closely in the picture you’ve posted (and in the picture at the link above), the join line between the top edge of the spats and the spoiler is horizontal whereas the join line between the standard R spoiler and spats is angled, so fitting the wider Clubsport spats to an R isn’t a straight swap - you’d need to change the tailgate and also fit the Clubsport spoiler, which makes it an expensive job!