During opening weekend, Once Upon A Deadpool managed 11th place, pulling in $1 million on opening day and $2.6 total for the entire weekend. Since then, it has scrounged together a bit more, and just before its first China release, the flick has made a little over $6 million total, compared to the more than $740 million Deadpool 2 made worldwide.
Article source: https://www.cinemablend.com/news/2465318/once-upon-a-deadpools-pg-13-hook-really-did-not-entice-people-to-see-it-in-theaters