@leocg Ok, thanks for Your answer.
I have to check this again.

No answer here yet, but I noticed that with Android Opera Mini 52.2.2254.54723 sync work between laptop version just fine!
But I still wonder why this another Opera Android browser doesn´t sync att all?

I have Opera 72.0.3815.378 on my Linux laptop.
On my Android phone I have Opera 60.3.3004.55692.
The problem is that bookmarks sync doesn´t work between my laptop and phone. I have logged out and in alternately on both browsers but sync have not worked.
So what can I do?

I have some kind of solution now! Android Opera browser 53 didn´t sync, but I changed Mini Opera to my all mobile devices and now sync works!

@jbhughes54enwiler
I had same problem. Opera sync didn´t work between my Windows / Mint browsers - Android Opera mobile browsers. I found out that version 53 (Android) didn´t sync, but I changed it to Opera Mini Browser and now it syncs between all devices!

Sync doesn't Sync e.g. bookmarks between devices.
If I add bookmark on Android Opera I can't see that on my laptop Opera browser.

Sync doesn't work between my Windows laptop and Android apps. I have logged into same account and sync is on every equipment.. What I can do?