Tried new Opera One on my Windows PC few days ago, and I loved it. Imported everything from Chrome, installed Opera on my MacBook too and connected with PC.
Installed Opera Touch on my iPhone and loved it to. Was excited to finish switching from Chrome on all devices.
And now I found out that I can’t sync bookmarks and other stuff on my phone with MacBook and PC. It’s just ridiculous, why this obvious must-have feature is still not available? Even though this post is 3-years old and there many more like this, where people ask for it.
Especially now after release of Opera One and lots of its advertising on the internet. I’m sure that many new users right now are trying it and then decide not to continue use it not because they didn’t like the new Opera One (or mobile version), but simply because not having full browser synchronization between phone and PC in 2023 is total deal-breaker for most people. 
Please listen to your users, and finally implement it.