If running a M1 Apple Silicon , which I am so can not speak to Intel , the CMFsyncagent is a Normal Process in Big Sur
When I check is Activity Monitor and check what is connected to this process >> below are the open files
cwd
/
txt
/System/Library/PrivateFrameworks/CommunicationsFilter.framework/CMFSyncAgent
txt
/Library/Preferences/Logging/.plist-cache.xRP2tN5U
txt
/private/var/db/timezone/tz/2021a.1.0/icutz/icutz44l.dat
txt
/private/var/db/analyticsd/events.whitelist
txt
/usr/lib/libobjc-trampolines.dylib
txt
/usr/lib/dyld
txt
/System/Library/PrivateFrameworks/CorePhoneNumbers.framework/Versions/A/Resources/CorePhoneNumbers.ruleset
txt
/usr/share/icu/icudt66l.dat
0
/dev/null
1
/dev/null
2
/dev/null