From https://promusicianhub.com/what-is-punk-music/
In its most basic definition, Punk music is a manifestation of the rebellious, anti-authority punk subculture that peaked in the second half of the 1970s, primarily in the US and the UK. Not just a music genre, but punk is more of an attitude, a philosophy, and a whole way of being.
Sure it doesn't sound like punk music, but they sure as hell ripped a massive middle finger at authority.
It's worth noting that the act has been criticized by Malasia's queer community as exacerbating tensions and reinforcing negative stereotypes. I don't have a strong opinion but it's generally best to listen to the concerns of the community you're trying to stick up for before doing a political stunt on their behalf (I'm queer btw)
It's almost like any kind of advocacy done in name of a marginalized group without actually including and consulting said group is performative, masturbatory and counterproductive.
This applies to most things well-meaning "progressive" libs choose to champion: race, indigenous peoples, immigrants, you name it.
And from what I hear, the lead singer is just a loose cannon personally, and probably put zero planning into it.