Why is Michael dressed like a rapper from the early 2000's?

That gen Z asthenic

He's wearing a current style...

I mean his clothes aren’t too dissimilar from Jonathan’s aesthetic so maybe he just took a liking to it?

Maybe because that's what Aussies think kids in North America look like. I'd say it's a misguided attempt to fit in.

I’m assuming Alex was there and he’s probably the one who took the photo?

I think so because Michael is holding two beers

They are so beautiful

We need to have stuff like this going on with the them in the show.