It's been years now since SEOs have been using the link search operator at Google (e.g., link:yourdomain.com) and relying on it to provide meaningful data. But unfortunately there are still people out there that still use it to check their backlinks.
Now, we have confirmation that it's been removed. So, although using the link: search query in Google does in fact show results, we have confirmation now that it no longer works. And, you "shouldn't use it" according to John Mueller at Google.
To check backlinks to your site, verify your site in Google Search Console and download your link data. Or, better yet, use one of these tools: