Good afternoon friend, I want to tell you that I had the same problem and I realized that at the moment you can only connect to 'My Flow' with Opera Touch and it is no longer in the play store, you can only download it from the official Opera website, search Opera Touch on Google or the search engine of your choice.
The truth is that at first it was a bit 'problematic' for me, but the opera touch does not interfere with the normal Android opera and I only use it for 'My Flow', it is not heavy and it also has the advantage that you can see your open tabs from the computer to the phone I finally adapted and it works very well.
but well that is the solution that I give you it worked for me, I am happy and satisfied
I send you a cordial greeting, take care.