Be clear and concise when describing the problem. Be specific and remember to include important details, such as the exact error message or address of the site you're having trouble with.
Also see https://forums.opera.com/topic/23068/instructions-on-posting-about-problems-in-opera-for-computers
If you load Opera with the --show-component-extension-options command-line option, goto opera://extensions and enable the Adblocker extension, you'll see an additional extension named Stormcrow. This means that the adblocker is an extension. But, it's internal and private. Even if you had a package, I'm not sure it'd run in Chrome. It might rely on modifications that Opera makes to its Chromium source.
What's wrong with uBlock Origin for example? Example pages where it doesn't do the job?