The Geomap widget was added in Zabbix 6.0 LTS. You can read more about the widget in the Geomap documentation section: www.zabbix.com/documentation/current/en/manual/web_interface/frontend_sections/monitoring/dashboard/widgets/geomap
Unfortunately, there's no way to do this natively. As a workaround - you could use the Zabbix API to either keep count of the necessary entities or, if you're running Zabbix 6.0, try to retrieve and monitor the required entities by using the auditlog.get API method. You can read more about it here: www.zabbix.com/documentation/current/en/manual/api/reference/auditlog/get
