I don't believe Arriva operate any open top services in North Wales now.
Though, it goes without saying, with it being Arriva, finding any concrete information either way isn't easy.
Unfortunately you are both correct.
- It's probably a dumb question (as it would require them to be entrepreneurial) but does Arriva have any O/T services now? I recall Rhyl and a limited Southport offering in the past.
I live in the area and haven't seen any Arriva open-toppers since a few years before the pandemic.