Created attachment 221754 [details] Screenshot: comparing an installed view with the online view Texts are missing from (at least) the SUBCOMMANDS section.
There is a SUBCOMMANDS section in the 12.2 online version too: https://www.freebsd.org/cgi/man.cgi?query=zfs&apropos=0&sektion=8&manpath=FreeBSD+12.2-RELEASE&arch=default&format=html Can you confirm the difference?