ArsTechnica reads that macOS Big Sur no longer supports AFP: https://arstechnica.com/gadgets/2020/11/macos-11-0-big-sur-the-ars-technica-review/12/#h7
No more AFP file sharing
Way back in 2013, Apple switched macOS’ default file sharing protocol from the venerable AFP (Apple Filing Protocol) to the more common SMB (Server Message Block) protocol. But AFP has stuck around in a deprecated, no-longer-improving form in the years since, working as a fallback option or a bridge to older versions of macOS with outdated SMB implementations.
Can someone confirm whether TimeMachine keeps working with Big Sur and MCH?