Following the tradition to offer commercial support for those who still want to use Ubuntu 16.04 LTS on their machines, Canonical is now offering extended security maintenance (ESM) support, which usually provides users with security updates for high and critical common vulnerabilities and exposures for an additional 3 to 5 years.
As such, Ubuntu 16.04 LTS (Xenial Xerus) is still supported until April 2024 with Extended Security Maintenance (ESM) through Canonical’s Ubuntu Advantage for Infrastructure, as well as on the public cloud with Ubuntu Pro for AWS (Amazon Web Services), Azure, and Google Cloud.