I used to be able to access all open windows on my Mac on my iPhone (or iPad) and vice versa (via the tabs button). Unfortunately, ever since I installed Safari 15.0 on my Mac and iOS 15 (and iPad OS 15), that doesn't seem to be possible anymore.
I also made sure that Safari is on in iCloud on all my devices. Was this feature dismissed by Apple or is it a bug? Are there ways to solve this issue?