I didn't get the chance to fully confirm that, yet, but if I'm not mistaken the stats are also not visible (showing only zeros) in the output of CLI "statistics" command. *IF* that's the case then it's either an ONTAP issue or the stats for intercluster LIFs got moved somewhere else.
@vachagan_gratian have you heard of that already and maybe know how to address it?
The suggestion is to use "csm_session" object, but there seems to be multiple snapmirror sessions for every IC LIF (each combination of a local and remote node results in a session?) so it does not seem to be the actual replacement for LIF statistics.