During the upgrade process from Zabbix version 6.4.17 to version 7.0.2 on Ubuntu 20.04, it was identified that critical components such as zabbix-apache-conf, zabbix-frontend-php, and zabbix-server-mysql are not available in the repository for version 7.0.2. This unavailability has resulted in an unsuccessful upgrade of the Zabbix server, which remains at version 6.4.17.

Key Findings:
Unavailable Components: The following Zabbix components for version 7.0.2 are not found in the repository for Ubuntu 20.04:
zabbix-apache-conf
zabbix-frontend-php
zabbix-server-mysql

Successful Upgrade of Other Components: The Zabbix agent was successfully upgraded to version 7.0.2, indicating that the agent's package is available for Ubuntu 20.04.
Comparison with Ubuntu 22.04: An upgrade attempt on a test machine running Ubuntu 22.04 was successful, where all components, including the server and frontend, upgraded without issues.