I've just watched it and they don't mention it in any time. Just one of them said that he thinks that adding Flow to Opera for Android would make sense, but it was just a personal opinion.
This part of the forum is in English. If you wish to post in your native language, look on the Local forums for the appropriate forum (looks to me like Italian).
I think that's normal with sync. My most recent tabs are always replacing previously
opened tabs if I close them so I keep the ones I want to sync open when syncing. You can also try checking your history for those tabs at sync.opera.com as long as you don't have Opera clean the history when exiting.
It is a question related to how the parameters are passed to the site. If you don't know, try leaving it as it is first. If that doesn't work, you can always try again and change it.
Ok, why the hell would Blokada (tracking blocker) block half of the features inside Opera for Android, particularly only search engine selection? That was very weird...