tbh man, I really don’t care what these girls wear or do.
Just because we’re the same ethnicity doesn’t give me the right to snoop in their business. I know it’s said a lot but it’s really between them and allah.
Of course you’re allowed to advise them, but if they don’t listen or even worse come back aggressively, just ignore them. The only girls you should worry about are your sisters, daughters, and wife.
Even if you could force a random halimo in a hijab. It wouldn’t make a difference, it’s the intention that matters. Hijab is a personal choice, you got better things to do than argue with a somali gaal.