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.
Freexian is for-profit, and all the LTS/ELTS contributors are Debian maintainers, and LTS is part of Debian, while ELTS is publicly available too, but in an external archive.
https://wiki.debian.org/LTS https://wiki.debian.org/LTS/Team https://wiki.debian.org/LTS/Extended https://wiki.debian.org/LTS/Funding
I was meaning to write Bookworm. Bookworm is the last to support i386 kernel and is supported until June 2028.