Idk its weird though because every single thing we do to our outward appearance is for the attention of others around us whether sexually socially or whatever.

This is where the disconnect is for you.

People can want to alter their appearance for their own reasons that have nothing to do with socialization. Sometimes it's just because they want to treat themselves, try something new, or just feel good about how they look.

I know a muslim woman who fully covers her hair with hijab in public and still colors a few select strands red if that introduces any new perspectives.

Yes. Dying your hair crazy colors will get you attention. But it doesn't mean that you dyed your hair because you wanted attention.

If my dog goes too far away, I will shout its name very loud so it hears me and comes back to me.

Doing this will inevitably draw the attention of most of the people around me. But that was not my intention though, I just wanted the attention of my dog. The attention of the other people is just an unavoidable side effect. It may even be an unwanted side effect.

Besides humans not being peacocks, I think there's a philosophical difference between being genetically programmed to get attention and actually consciously desiring attention. And wanting to look a certain way is not the same as wanting attention at any given moment from whoever.