I'm using Opera for a long time, currently on Linux (my favorite desktop platform), Windows and /e/OS (an Android derivative). Especially under Linux, the number of tab groups and tabs that have accumulated over time is very huge and overwhelming.
Recently, a really great feature to organize Your tabs has been added to the Android version of Opera (see screenshot below). In short, to help me (and probably many other users) to reorganize these tabs, I'd like to have this overview of tab groups and tabs in the desktop versions of Opera available, too.

Sincerely Yours - Alfred Novacek