how to help a link that I created on gitbook to get indexed?

I found a guide here that provided free links (I'll create another guide soon with all the links that I found) .
for example 1 link was to create a page on gitbook .
I created the page , and after 1 week its not indexed at all.

Do I need create other links to that page for it to get indexed?

Share your GitBook page on social media or relevant platforms to generate traffic, which can signal to Google that it’s worth indexing.

Make sure that it won't have any noindex tags. As advised you can promote them on social media. Also, send some backlinks to the article and if needed you can try indexing services.