@bhavatitdhyan
Hi,
Yeah. I've read more and more about it, and it just appears that Opera is not good at synching with any iPhone. So, I followed a suggestion from somewhere. I downloaded and installed Raindrop, from raindrop.io. It's great. It's taken me a while to get through its intricacies, but it's a powerful tool. Likewise, it has both a browser extension and a Mac app. The extension allows you to save bookmarks, but not go to them. You need the app to actually go to any bookmark. I've got it in my dock so it's easy to get to.
You start out with it by importing your bookmarks from wherever your bookmarks are, presumably Opera.
Any bookmarks saved with Raindrop will never show up, though, in your regular Opera bookmarks view. Which, yeah, is weird, but the app is designed to be a thing of its own. And, it is powerful.
Cheers.