Normally RHEL/CentOS releases are supported for 10y - CentOS 6 was 2010-2020, CentOS 7 is 2014-2024. 8 was released in 2019 so you might expect it to be support

Normally RHEL/CentOS releases are supported for 10y - CentOS 6 was 2010-2020, CentOS 7 is 2014-2024. 8 was released in 2019 so you might expect it to be supported through 2029, a year ago they announced it would be brought forward by 8 years.