There are several mismatches between the Supported Functions|https://www.zabbix.com/documentation/7.0/en/manual/appendix/functions] documentation page and the list in the trigger "Add expression" dialog.

In the frontend list:

• find() is under String group instead of History
• bucket_percentile() is missing in the list
• histogram_quantile() is missing in the list
• countunique() appears in the Aggregate group instead of History group
• count() appears in the Aggregate group but not in History group