Who do you work for and how can you wear your own kit?

I’ve been filled with questions lately, maybe it’s because I’ve only worked for companies that let me use their uniforms, guns, gear and body armor. What companies are letting you wear Gucci plate carriers? Who bought the body cam, you or the company? What client is okay with you walking through the door with a plate carrier and khaki pants and not a cop type uniform and an under carrier? What kind of negative interactions with the public have you had and will the company cover you in case of use of force? Sorry for the question vomit but I had to get it out, thank you for reading this.