Which one are you talking about? One of those saxiibs looks like he's saucing (black t-shirt), one looks quite decent (yellow) and tank top one looks like he casually lifts. I looked better than that last guy at 23 without even trying for hypertrophy (wasn't looking to get big and as strong as I could):Somalis at best can have a body like this one:
America vs Somali bodybuilders back challenging - YouTube
And Mat Fraser's look isn't what I'd call unreasonably lean and bulky at all. He's very fluffy and barely even vascular:
Plenty of guys of any ethnicity, especially at a "manlet" height, can look similar without PEDs. You have pretty low expectations if this is a 'roids look to you, walaal.