Monster Hunter Rise has passed 8m now. I would assume the PC release is what pushed it over 8m.
https://www.capcom.co.jp/ir/english/news/html/e220118.html
Capcom Co., Ltd. (Capcom) today announced that Monster Hunter Rise for Nintendo Switch and PC (Steam) has shipped 8 million units worldwide.
The Monster Hunter series consists of hunting action games that pit players against giant monsters in a beautiful natural environment. Beginning with the first title in 2004, the series established a new genre in which players cooperate to hunt ferocious monsters with their friends and has since grown into a global phenomenon with cumulative sales of the series exceeding 78 million units shipped as of September 30, 2021.
Monster Hunter Rise was released for Steam, a PC platform with a broad global user base, on January 13, 2022*. Featuring high-resolution 4K support and voice chat functionality for PC, the game provided a fresh hunting experience that garnered praise from players while additionally growing the player base across a wide range of countries and regions. This, combined with sales of the Nintendo Switch version that was released in March 2021, drove global shipments of the game to surpass 8 million units.*Japan Standard Time
Going forward Capcom looks to further expand its player base with Monster Hunter Rise: Sunbreak, a massive premium expansion for this title that is slated for release in summer of 2022.
Capcom remains firmly committed to satisfying the expectations of all users by leveraging its industry-leading game development capabilities.