@osxking Yes. For example, if you goto the URL opera://about, take not of the "profile" path, close Opera and edit the "Local State" one level up from the profile folder, you can change the country and country_from_server values to the country code of your liking. For example, if you set them to RU, Yandex will be available as a default search engine. If you set them to CN, Baidu will be available as a default search engine.
You can open the "default_partner_content.json" file in the latest version folder in the Opera GX install folder (install path shown at the URL opera://about) to see what each country code provides. As you'll see, most of them are the same as already said, so it's not going to help much.