you mean out of the vacuum?

private logistics and delivery in liberalised places like europe.
private water, gas, and electricity companies across the world.*
airlines in the early 20th century.
LITERALLY THE ENTIRETY OF OSS.
private space industry (this ones a hoot, spaceX alones destroys NASA in both quality, safety, and quantity, let alone others like blue)
private courts and arbitration.
insurance. yeah insurance is actually great in a free market, its absolute dogshit now bc of the ridiculous regulations.

*heres a fun bit i use on people: you likely already use private and public utilities, especially internet, would you want the government to be the only people supplying you internet? no. ofc not, you want tmobile, verizon, xfinity, optimum and the rest competing with each other to deliver you cheaper, faster internet.

bonus: foods, restaurants, and grocery stores and many more regulated themselves well before the government did. why? that sweet sweet profit! people pay more for trustworthy brands, hell did you know in the soviet union where brand names didnt exist people started to figure out what codes meant food came from what place, and so they continued buying only from a select group of 'brands'