Office doesn't exist any more. Product suite was renamed to Copilot 365.
Just like Twitter is now X, full stop? With the difference that the "Office" brand is much older and has much more staying power. Besides, the desktop application suite is still named the same AFAIK.
I dislike MS as much as the next guy, but it's the Office mobile app that was renamed to Copilot 365. They haven't yet thrown away the entire Office brand