I see. The missing bit for me was the package name,
sublime-text. That should be part of the documentation somewhere. It should be mentioned on the download page, even.
Other than this, I see
sublime-text/apt/dev,now 3133 amd64 [installed] when running
apt list | grep sublime. So when I installed the Sublime Text
deb package that was previously available on the downloads page with
dpkg, this is what
sudo apt upgrade updated. Good to know.
Thank you for your help.
P.S. The visual presentation of code in the forums lacks a good enough distinction from regular text. I see the monospaced font, but it’s a bit hard to see when a piece of inline code starts and when it ends.