Source: https://www.reddit.com/r/zabbix/comments/scpkp3/zabbix_upgrade_available_indicator/?utm_source=share&utm_medium=web2x&context=3

It would be nice, if Zabbix Frontend had an Upgrade indicator. Something that tells you, that a new minor or major release is available. A good spot might be the System information view (zabbix.php?action=report.status).

Of course, there should be a setting to turn it on or off in one of the php config files, like we already do with the "database tables upgraded" switch. You should also be able to set if you want to see only minor and/or major releases.