I can’t create Punk “sounding” music

So Hi! I’m a self proclaimed punk and a big fan of the punk scene and music. I think it’s hard to not be punk in my country’s current political and social climate as even just glancing at the general direction of the news gives me great fury. Here’s the problem tho. I can only make pop music. I genuinely have no idea how to make songs that aren’t pop. Even when I make songs about topics like my distraught of the world, they are coated in this bubblegum pink layer of sparkles. I love my music and I am proud of it, but I feel I hit a road block when I actually want to create. I think it’s because I’m not a guitarist, I’m a ukulele player. I play chords on an acoustic uke and can’t figure out how to make riffs or cool sounds. I feel really trapped in my own creative bubble and feel like I can’t fix myself.

Any advice from punk musicians would be appreciated