The guy has 4 scored and 4 missed from 8 penalties. I'm probably the biggest Raheem Sterling fan you're likely to find on this whole forum, I regularly refer to him as my favourite football player of all time and I've certainly made at least 100 posts defending him, but for any Premier League footballer a 50% conversion ratio is simply bad. I won't get used to him taking them because he's absolutely nowhere near our best taker of them and in any situation where the penalty is important I think Sterling taking them over Mahrez, De Bruyne or Gundogan would be a horrific idea.He's scored from 5 of his last 6 penalties and he's obviously made a concerted effort at volunteering for them post Euro 2020 so get used to him taking them would be my advice.
On another note, Sterling now being the third top scorer in the Premier League is absolutely incredible considering how slowly he started the season.