Pretty sure I read on Forbes that Widow made 80 million its opening weekend in theaters, with 60 mil streaming. Set a post-pandemic opening record, which was broken the following week by...Space Jam, maybe? Some kid-family film. I believe Widow was the third highest grossing MCU origin film for a solo IP, and set a MCU record for second-weekend drop.
By the standards of the day it seems to have done fine. The second weekend drop is regretful, but likely a result of the film airing same-day on D+, which gives casuals a great alternative to cinemas. My family stayed home and streamed it; it's cheaper and doesn't shut us in a room crammed full of people who may or may not have the good sense to stay the F home if they're unvaccinated. Honestly, I wish Marvel was going to release all their 2021 films that way.