upgrade to office 365 personal to family subscription

Are you offered other subscription levels in the subscription details?

Managing auto-renewing subscriptions -

http://support.apple.com/kb/HT4098

M1 Mac mini, macOS 11.2.2; Watch, series 5 GPS/cellular, watchOS 7.3.1; iPad Pro 2nd Gen, iPadOS 14.4; iPad Air 2, iPadOS 14.4; iPhone 12 Pro, iOS 14.4; TV 4th Gen, tvOS 14.;  HomePods, audioOS 14.4 and Airport Express w/ Airplay 2