Ubuntu 20.10 was released nine months ago on October 22nd, 2020, and was the first Ubuntu release to ship with desktop images for the Raspberry Pi 4 single-board computer. It was powered by Linux kernel 5.8 and featured the GNOME 3.38 desktop environment by default.
But, not being an LTS (Long-Term Support) release, Ubuntu 20.10 only received software and security updates for nine months, until July 22nd, 2021. After this date, Canonical will stop feeding updates to the Groovy Gorilla release, which, in time, will become vulnerable to all sorts of attacks.