I updated to Cobia last week and noticed that Zabbix wasn't pulling a lot of data anymore. After looking into it, I cannot find any OIDs for datasets and the data at that location looks like it's now zvol instead. It seems like the OIDs for pools have changed as well.
I also checked /usr/local/share/snmp/mibs/TRUENAS-MIB.txt and do not see anything for datasets.
I also checked /usr/local/share/snmp/mibs/TRUENAS-MIB.txt and do not see anything for datasets.