Not by Debian it isn't.

https://www.debian.org/releases/

Buster has not been supported by Debian for many years.

Buster LTS was EOL last summer. Note that LTS is supported by volunteers via a non-profit, not Debian (though they do a good job).

ELTS is paid support, again not by Debian.

Do look at Debian's wiki for more info on support timeframes, and what LTS and ELTS means.

Thanks, I assume some of that is sort of extended, asterisked support though?