Cannot add Linked Issues

[roboquaternion]

I am new to GitHub. I am trying to make make many issues on my board and would like to play around with Linked Issues to learn how they work. The documentation says that I can click "Create Linked Issues" from the sidebar of an existing issue. But I cannot find that button. Am I missing something?

Here is a screenshot of an existing issue's sidebar. This was taken on MacOS and Brave browser. I also tried Firefox and Safari, in regular and incognito mode. I have not tried Windows yet.

[lemorage]

watch the note in the documentation here

$${\color{blue}\textbf{Note}}$$
Issue types, sub-issues, and advanced issue search are currently in an opt-in public preview for organizations.

[roboquaternion]

What a bummer that only organizations can do it so far. I hope they make this available soon for individuals. For now I am using -[ ] in markdown, then convert to an issue. In a restricted sense it works OK.