@operahasdeletedallmypasswords Your synced saved passwords are encrypted using your Opera account credentials and, as you probably have already figured out, to decrypt it you need to provide the password used when the data was encrypted, that is usually the previous password.
So, if you can't remember that password then there is no way for Opera to decrypt your synced saved passwords and allow you to use them.
А virus ate my operating system and I lost my sync password. Now, in an attempt to restore my bookmarks, I followed the path recommended by Opera and deleted everything.
In general, this is a serious criticism of Opera, because I already found a warning about it on the page https://help.opera.com/en/account/#password with FAQ after this, and there is no feedback on the question. In addition, it was all destroyed in one click. And no confirmation of actions, nor the ability to cancel the decision.
It's useless to talk about it, because nothing can be changed, but it's still very sad.
I agree that Sync is not working. I have logged in to Opera on all my devices: iPhone, iMac, MacBook Air, and none of the Opera browsers match. The one on the iMac was the first browser I set up and the Speed Dial, tabs, passwords, and bookmarks are what I'd like to see in the Opera browser on my other devices. I don't get any of the Speed Dial entries, bookmarks, or tabs on the browsers on the other devices.
I have made the settings for Sync in each browser so that all data should be synced but how do I get it to sync? I have clicked the "Synchronize your data" button on the "You're now logged in" page but nothing happens except to take me to the "Advanced sync settings" page, which I've already set up. I've selected Sync everything and I've tried selecting the Customize sync selection in each devices' browser and nothing syncs. It seems the Do not sync data selection is permanently set.