This is so disappointing! The fact that there is no bookmark/account sync option 3/4 of the way into 2023 is ridiculous, especially since this thread was started two years ago. I recently downloaded Opera One to my PC because of an ad from a Youtuber I follow, and I fell in love with the UI immediately. Now I'm going through on my iPhone and iPads trying to set up Opera there only to find out I can't synchronize across these platforms. It's such a shame because it is a truly beautiful experience to use. I know this feature is available on Edge and Chrome, so what's preventing the team at Opera from allowing this? It's really all they need to do in order to get so many new people on board.