There are multiple way to get good backlink. one such way is.
1.) Go to google and search site:
wikipedia.org ‘your key phrase’ ‘dead link’ (Change key phrase with your topic or keyword). This will return all the dead link of wikipedia.
2.) Then open relevant search result according to your product & check which link is dead.
3.) Write an article same as dead link and edit the link with your blog link. Boom you have wikipedia link on your blog article and then interlink your product page within article.
Reference article -
https://backlinkseo.com/how-to-find-broken-links-on-wikipedia/
What more you can do is check backlink of that dead page in ahrefs and send email to blog/website owner that this particular link in your blog is broken, you can replace that link with your blog article. this will give you more quality backlink.
Repeat this process with multiple dead pages.