Payments firm Airwallex has raised new funding at around a $12 billion valuation led by Lee Fixel's Addition, Axios has learned.Driving the news: The new round marks a 50% increase over its $8 billion valuation late last year, also led by Addition.Airwallex also is said to have hit the $1.5 billion ARR mark, versus $1 billion last October, with talk of hitting $2 billion by year-end. Its U.S. unit processes around $100 billion for over 40,000 businesses.The company is expected to seek a U.K. ban...