Erm
...
I think you'll find that in 24th October 2017 he played a full 6 minutes as a right back:
https://www.transfermarkt.com/nathan-ake/leistungsdatendetails/spieler/177476/saison//verein/0/liga/0/wettbewerb//trainer_id/0/pos/5

*Awaits apology*


In all seriousness I assume getting a centre back/left back means well be going with Jake O'Brien as starting first choice right back, which if he's happy with that I'm sort of too as I think he's done well enough. Id like a specialist but getting 9-10 players in was always going to be tough and there's be compromises along the way.